Mohs Surgery Complications: Risks and How to Minimize Them

Understanding Facial Reconstructive Surgery: Restoring Form and Function

Facial reconstruction after trauma, cancer removal, or congenital conditions can feel overwhelming. Many patients worry about both the physical aspects—pain, recovery time, and potential complications—and the emotional impact of facial changes. Will you look like yourself? Will others notice your surgery? These concerns are completely normal and form an important part of your surgical journey.

Facial reconstructive surgery combines sophisticated surgical techniques with artistic principles to restore both appearance and function. Using carefully planned incisions, tissue rearrangement, and sometimes grafting procedures, we can rebuild damaged facial structures while preserving natural contours and expressions. Each procedure is meticulously tailored to your unique facial anatomy and specific needs.

Recovery typically progresses through several phases. Initial healing takes 1-2 weeks, during which you’ll experience some swelling, bruising, and discomfort that gradually improves. Most patients return to normal activities within 2-3 weeks, though complete healing continues for several months as scars mature and tissues settle into their final position.

As a dual-qualified surgeon with extensive experience in facial aesthetics, Mr. Patel prioritises results that look natural and balanced—reconstruction that respects your unique facial characteristics rather than creating an obvious “operated” appearance. The goal is always to help you feel like yourself again.

Every reconstructive journey begins with a comprehensive consultation to understand your specific concerns and goals. To discuss your individual situation and explore appropriate reconstructive options, please book a personal consultation with Mr. Patel.

Table of Contents

• Understanding Mohs Surgery and Its Importance in Skin Cancer Treatment
• Common Complications and Risks of Mohs Surgery
• What Are the Signs of Infection After Mohs Surgery?
• Managing Scarring and Aesthetic Outcomes After Mohs
• Potential Nerve Damage: Causes and Recognition
• Bleeding Complications: Prevention and Management
• How to Minimize Your Risk of Mohs Surgery Complications
• Recovery Timeline and When to Seek Medical Attention

Understanding Mohs Surgery and Its Importance in Skin Cancer Treatment

Mohs micrographic surgery represents the gold standard in treating certain types of skin cancer, particularly basal cell carcinoma and squamous cell carcinoma. This highly specialised technique offers the highest cure rate whilst preserving the maximum amount of healthy tissue—a critical consideration when treating cancers on the face, head, and neck where tissue preservation directly impacts both function and aesthetics.

The procedure involves removing thin layers of cancerous tissue one at a time, examining each layer under a microscope immediately during surgery. This meticulous process continues until no cancer cells remain, ensuring complete tumour removal whilst minimising the surgical defect. The precision of Mohs surgery makes it particularly valuable for treating skin cancers in cosmetically and functionally sensitive areas.

As a dual-qualified Consultant Oral and Maxillofacial Surgeon, Mr. Shilen Patel brings both medical and surgical expertise to the reconstruction phase following Mohs surgery. Whilst dermatologists typically perform the cancer removal, the resulting defect often requires sophisticated reconstructive techniques to restore both form and function—particularly when the surgery involves the facial region, lips, nose, or areas around the eyes.

Why Mohs Surgery Is Preferred for Facial Skin Cancers

The face presents unique challenges in skin cancer treatment. Traditional excision methods require wider margins of healthy tissue removal to ensure complete cancer clearance, which can result in larger defects and more noticeable scarring. Mohs surgery addresses this concern through its layer-by-layer approach, achieving cure rates exceeding 99% for primary basal cell carcinomas whilst preserving precious facial tissue.

This tissue-sparing benefit becomes particularly important when treating cancers near critical structures such as the eyelids, nose, ears, or lips. These areas demand both functional preservation and aesthetic consideration—outcomes that align perfectly with Mr. Patel’s philosophy of combining surgical precision with an artistic eye for natural-looking results.

The Role of Reconstructive Surgery After Mohs

Following successful cancer removal, the reconstruction phase begins. Depending on the size, depth, and location of the defect, various reconstructive options may be considered, from simple closure to complex flap reconstruction. Mr. Patel’s dual qualification in both medicine and dentistry provides a comprehensive understanding of facial anatomy, enabling him to design reconstruction plans that restore not only appearance but also function, sensation, and symmetry.

Understanding the Mohs procedure and its importance helps patients appreciate why certain post-operative complications may occur and how proper management can optimise both oncological and aesthetic outcomes.

Common Complications and Risks of Mohs Surgery

Whilst Mohs surgery is considered safe and highly effective, like all surgical procedures, it carries potential risks and complications. Understanding these Mohs surgery risks enables patients to make informed decisions and recognise early warning signs that require medical attention. The vast majority of patients experience straightforward healing, but awareness of possible Mohs surgery complications ensures prompt intervention when needed.

Infection

Wound infection represents one of the most common post-operative concerns following any surgical procedure, including Mohs surgery. The risk varies depending on the location of the surgery, with certain facial areas and sites with compromised blood supply carrying slightly higher infection rates. Infection after Mohs typically occurs within the first week following surgery, though it can develop later in rare cases.

The overall infection rate following Mohs surgery remains relatively low, typically ranging from 1-3% of cases. However, certain factors increase this risk, including diabetes, immunosuppression, smoking, and surgery on the lower legs where circulation may be compromised. Proper wound care and adherence to post-operative instructions significantly reduce infection risk.

Bleeding and Haematoma Formation

Bleeding complications Mohs surgery can occur either during the procedure or in the post-operative period. Whilst some minor oozing is normal in the first 24-48 hours, significant bleeding requires immediate attention. A haematoma—a collection of blood beneath the skin—may develop if bleeding occurs into the surgical site, creating swelling, discolouration, and potential wound healing complications.

Patients taking blood-thinning medications face increased bleeding risk, though these medications are often continued due to the greater risks associated with stopping them. Mr. Patel carefully evaluates each patient’s medication regimen and medical history to balance bleeding risk against the necessity of anticoagulation therapy.

Scarring and Aesthetic Concerns

All surgery results in scarring, and scarring Mohs surgery varies considerably based on multiple factors including the size and location of the defect, the reconstruction technique employed, individual healing characteristics, and post-operative scar management. Facial skin generally heals well due to excellent blood supply, but certain areas such as the nose, ears, and lower eyelids present unique challenges.

The appearance of scars evolves significantly over time, with most scars continuing to improve for 12-18 months following surgery. Initial redness, thickness, and prominence gradually fade as the scar matures. However, some patients may develop hypertrophic scars or keloids, particularly those with genetic predisposition or darker skin tones.

Nerve Damage

Nerve damage Mohs can occur when the skin cancer involves or lies close to sensory or motor nerves. The face contains numerous important nerves responsible for sensation, facial expression, and eyelid function. Whilst surgeons take great care to preserve nerve function, sometimes cancer location necessitates nerve sacrifice to achieve complete tumour removal.

Temporary numbness around the surgical site is common and typically resolves over weeks to months as nerves regenerate. However, permanent sensory changes may occur, particularly with larger excisions. Motor nerve injury, though less common, can affect facial movement and requires careful evaluation and potential intervention.

Wound Dehiscence

Wound dehiscence refers to partial or complete separation of the wound edges after closure. This complication can result from excessive tension on the wound, infection, poor blood supply, or premature return to strenuous activity. Areas subject to movement, such as around the mouth or on the scalp, carry higher dehiscence risk.

When dehiscence occurs, the wound may require additional intervention ranging from conservative management with dressings to surgical revision. Early recognition and appropriate management minimise long-term consequences.

Functional Impairment

Depending on the location of the Mohs surgery, functional complications may arise. Surgery near the eyelids can affect eye closure or tear drainage. Procedures involving the nose may impact breathing. Excisions around the mouth can influence lip movement and oral competence. These Mohs procedure side effects require careful assessment and may necessitate additional reconstructive procedures to restore optimal function.

Recurrence

Whilst Mohs surgery offers the highest cure rates for skin cancer, a small risk of recurrence remains, particularly with aggressive tumour subtypes or in immunosuppressed patients. Regular follow-up examinations enable early detection of any recurrence, when treatment is most effective.

Understanding these potential complications empowers patients to participate actively in their recovery and seek timely medical attention when concerns arise. Mr. Patel’s comprehensive approach includes thorough pre-operative counselling about risks, meticulous surgical technique to minimise complications, and attentive post-operative care to address any issues promptly.

What Are the Signs of Infection After Mohs Surgery?

Recognising wound infection symptoms early is crucial for preventing serious complications and ensuring optimal healing after Mohs surgery. Whilst some degree of redness, swelling, and discomfort is normal in the immediate post-operative period, certain signs indicate that infection may be developing and require prompt medical evaluation.

Early Warning Signs of Infection

Infection after Mohs typically manifests within the first 3-7 days following surgery, though it can occasionally develop later. The classic signs of infection include:

Increasing Pain: Whilst some discomfort is expected after surgery, pain should gradually improve over the first few days. Pain that worsens after initial improvement or becomes increasingly severe may signal infection. The pain associated with infection is often described as throbbing or pulsating and may be disproportionate to the size of the wound.

Expanding Redness: Some redness immediately around the incision is normal, but this should remain stable or gradually fade. Redness that spreads outward from the wound edges, particularly if accompanied by warmth, suggests developing infection. Drawing a line around the area of redness with a pen can help monitor whether it is expanding—a useful technique Mr. Patel often recommends to patients.

Increased Swelling: Initial post-operative swelling typically peaks within 48-72 hours and then gradually subsides. Swelling that increases after this period or develops suddenly may indicate infection or fluid collection. The swollen area may feel firm or fluctuant depending on whether inflammation or abscess formation is occurring.

Purulent Drainage: Whilst some clear or slightly blood-tinged drainage is normal in the first few days, thick yellow, green, or foul-smelling discharge indicates infection. The presence of pus requires immediate medical attention and may necessitate wound culture to identify the causative organism and guide antibiotic selection.

Systemic Signs of Infection

In addition to local wound changes, infection can produce systemic symptoms that indicate the infection is affecting the body more broadly:

Fever: A temperature above 38°C (100.4°F) following Mohs surgery warrants medical evaluation. Fever indicates that the body is mounting an immune response to infection and may signal that oral antibiotics alone are insufficient.

Chills and Malaise: Feeling generally unwell, experiencing chills, or developing flu-like symptoms after surgery can indicate systemic infection. These symptoms should never be dismissed as normal post-operative recovery.

Lymph Node Swelling: Tender, enlarged lymph nodes near the surgical site—such as in the neck following facial surgery—may indicate that infection is spreading through the lymphatic system.

Distinguishing Normal Healing from Infection

Understanding the difference between normal post-operative changes and signs of infection helps patients avoid unnecessary anxiety whilst remaining appropriately vigilant. Normal wound healing after Mohs includes:

• Mild to moderate discomfort that improves daily
• Pink or light red colour immediately around the incision that remains stable
• Mild swelling that peaks around day 2-3 and gradually resolves
• Small amount of clear or blood-tinged drainage in the first 24-48 hours
• Slight warmth around the wound due to increased blood flow during healing

When these normal findings begin to worsen rather than improve, or when the signs described above develop, infection should be suspected.

Special Considerations for Facial Infections

Infections following facial Mohs surgery require particular attention due to the rich vascular supply of the face and proximity to critical structures. The facial region’s extensive blood and lymphatic networks mean infections can spread more rapidly than in other body areas. Additionally, infections near the eyes, nose, or within the “danger triangle” of the face carry risks of more serious complications.

Mr. Patel emphasises the importance of early intervention for any suspected facial infection. His dual medical and surgical training enables comprehensive assessment and management, from appropriate antibiotic selection to surgical drainage if required.

When to Contact Your Surgeon

Patients should contact their surgical team immediately if they experience:

• Increasing pain after initial improvement
• Spreading redness or red streaks extending from the wound
• Purulent or foul-smelling drainage
• Fever above 38°C (100.4°F)
• Increasing swelling after the first few days
• Wound separation or dehiscence
• Any concerns about wound healing

Prompt communication enables early intervention, which significantly improves outcomes and prevents minor issues from progressing to serious complications. Mr. Patel and his team maintain accessible communication channels to address patient concerns throughout the recovery period, reflecting his commitment to comprehensive, patient-centred care.

Managing Scarring and Aesthetic Outcomes After Mohs

Scarring represents one of the most common concerns patients express following Mohs surgery, particularly when the procedure involves visible areas of the face. Whilst all surgery produces scars, understanding the factors that influence scar formation and the interventions available to optimise aesthetic outcomes helps patients maintain realistic expectations whilst actively participating in achieving the best possible results.

The Science of Scar Formation

Scarring Mohs surgery occurs as part of the natural wound healing process. When skin is incised, the body initiates a complex cascade of cellular events to repair the defect. This process involves inflammation, new tissue formation, and remodelling—phases that continue for many months following surgery.

Initially, wounds heal with immature scar tissue that appears red, raised, and firm. Over time—typically 12-18 months—scars mature, becoming flatter, softer, and lighter in colour. This maturation process varies considerably between individuals and is influenced by factors including genetics, age, skin type, wound location, and post-operative care.

Factors Affecting Scar Quality

Multiple factors influence the final appearance of scars following Mohs surgery:

Surgical Technique: The reconstruction method employed significantly impacts scarring. Mr. Patel’s meticulous surgical approach, informed by his artistic eye and extensive training, focuses on precise tissue handling, appropriate tension distribution, and strategic incision placement to optimise aesthetic outcomes. Techniques such as layered closure, which approximates tissue at multiple depths, and placement of incisions along natural skin creases or aesthetic subunit boundaries, minimise scar visibility.

Wound Location: Facial areas differ in their healing characteristics. The forehead, cheeks, and areas with good blood supply typically heal with finer scars, whilst the nose, ears, and lower eyelids present greater challenges. Skin thickness, sebaceous gland density, and the direction of natural skin tension lines all influence scar appearance.

Wound Size and Tension: Larger defects and closures under significant tension tend to produce more prominent scars. When primary closure would create excessive tension, Mr. Patel may recommend alternative reconstruction techniques such as skin grafts or local flaps to distribute tension more favourably and achieve superior aesthetic results.

Individual Healing Factors: Genetic predisposition plays a substantial role in scarring. Some individuals naturally produce finer, less noticeable scars, whilst others are prone to hypertrophic scarring or keloid formation. Age affects healing, with younger patients typically experiencing more robust scar formation. Skin type influences scarring patterns, with darker skin tones carrying higher risk of hyperpigmentation or keloid development.

Post-Operative Care: Patient adherence to wound care instructions significantly impacts scar quality. Proper wound hygiene, sun protection, and activity modification during healing all contribute to optimal outcomes.

Scar Treatment After Mohs: Optimising Aesthetic Outcomes

Numerous interventions can improve scar appearance following Mohs surgery. Mr. Patel develops personalised scar management plans based on individual healing patterns, scar characteristics, and patient goals.

Early Intervention Strategies

The first few months following surgery represent a critical window for scar management:

Silicone-Based Products: Silicone gel sheets or ointments represent first-line therapy for scar management. These products hydrate the scar, regulate collagen production, and have been shown to improve scar texture, colour, and pliability. Application typically begins once the wound has fully epithelialised, usually 2-3 weeks post-surgery.

Sun Protection: Ultraviolet radiation can cause permanent hyperpigmentation in healing scars. Rigorous sun protection using broad-spectrum SPF 50+ sunscreen, protective clothing, and sun avoidance is essential for at least 12 months following surgery. This simple measure significantly improves final scar appearance.

Massage: Once the wound has healed, gentle scar massage can improve pliability and reduce thickness. This technique helps remodel collagen fibres and reduce adhesions between tissue layers.

Pressure Therapy: For certain locations and scar types, pressure garments or taping can reduce hypertrophic scar formation by modulating collagen deposition.

Advanced Scar Revision Techniques

When scars remain prominent despite conservative management, or when initial healing produces suboptimal results, various revision techniques may be considered:

Surgical Scar Revision: This involves excising the existing scar and re-closing the wound using refined techniques to improve alignment, reduce tension, or reorient the scar along more favourable lines. Mr. Patel’s artistic approach to scar revision focuses on creating scars that blend naturally with facial contours and skin texture.

Laser Therapy: Various laser modalities can improve scar appearance by reducing redness, improving texture, and stimulating collagen remodelling. Pulsed dye lasers target vascular components of red, hypertrophic scars, whilst fractional lasers improve texture and blend scar edges with surrounding skin.

Injectable Treatments: Depressed scars may benefit from dermal fillers to restore volume and create a smoother contour. Conversely, raised scars can be treated with intralesional steroid injections to reduce inflammation and flatten the scar.

Dermabrasion and Chemical Peels: These resurfacing techniques can improve scar texture and blend scar edges with surrounding skin, particularly effective for scars with abrupt transitions or surface irregularities.

Setting Realistic Expectations

Whilst modern techniques can significantly improve scar appearance, it is important to understand that scars cannot be completely eliminated. The goal of scar treatment after Mohs is to create a scar that is as inconspicuous as possible whilst maintaining or restoring function.

Mr. Patel’s approach combines technical excellence with honest communication about expected outcomes. During consultations, he discusses the likely appearance of scars based on the specific surgical site, planned reconstruction technique, and individual patient factors. This transparency enables patients to make informed decisions and maintain realistic expectations throughout their healing journey.

The Role of Patience in Scar Maturation

Perhaps the most important factor in achieving optimal aesthetic outcomes is patience. Scars continue to improve for 12-18 months following surgery, with the most dramatic changes occurring in the first six months. Early scar appearance does not predict final results, and premature intervention can sometimes be counterproductive.

Mr. Patel schedules regular follow-up appointments to monitor healing, address concerns, and adjust scar management strategies as needed. This ongoing relationship ensures that patients receive appropriate support throughout the maturation process and that any interventions are timed optimally for best results.

By combining meticulous surgical technique, evidence-based scar management protocols, and advanced revision options when needed, Mr. Patel helps patients achieve aesthetic outcomes that restore confidence whilst maintaining the oncological success of their Mohs surgery.

Potential Nerve Damage: Causes and Recognition

Nerve damage Mohs represents one of the more concerning potential complications, particularly when surgery involves the face where numerous important nerves control sensation, facial expression, and specialised functions such as eye closure and lip movement. Understanding the types of nerve injury that can occur, their causes, and how to recognise them enables appropriate management and realistic expectations about recovery.

Facial Nerve Anatomy and Function

The face contains an intricate network of sensory and motor nerves. Sensory nerves provide feeling to the skin, whilst motor nerves control the muscles responsible for facial expression. The facial nerve (cranial nerve VII) and its branches control movement of the forehead, eyelids, cheeks, and mouth. The trigeminal nerve (cranial nerve V) provides sensation to the face through three main divisions: ophthalmic, maxillary, and mandibular.

Mr. Patel’s comprehensive understanding of facial anatomy—enhanced by his dual qualification in medicine and dentistry—enables him to navigate this complex neural landscape during reconstruction, minimising injury risk whilst achieving complete cancer removal and optimal aesthetic restoration.

Types of Nerve Injury

Nerve injuries are classified based on severity:

Neurapraxia: This represents the mildest form of nerve injury, involving temporary disruption of nerve function without structural damage to the nerve itself. Neurapraxia typically results from compression, stretching, or local anaesthetic effects. Recovery is usually complete and occurs within days to weeks as the temporary dysfunction resolves.

Axonotmesis: This involves damage to the nerve fibres (axons) whilst the surrounding nerve sheath remains intact. Recovery requires nerve regeneration, which occurs at approximately 1mm per day. Depending on the distance the nerve must regenerate, recovery may take weeks to months, but is often complete because the intact nerve sheath guides regenerating fibres to their targets.

Neurotmesis: This represents complete nerve transection, the most severe form of nerve injury. Without surgical repair, recovery is unlikely. When cancer involvement necessitates nerve sacrifice, Mr. Patel discusses options for nerve grafting or other reconstructive techniques to restore function when possible.

Causes of Nerve Damage During Mohs Surgery

Several factors can lead to nerve injury during or after Mohs surgery:

Tumour Location: Skin cancers located directly over or adjacent to important nerves pose the highest risk. Sometimes, cancer cells have invaded the nerve itself (perineural invasion), necessitating nerve sacrifice to achieve complete tumour removal. In these cases, oncological success takes precedence, but reconstructive options are explored to minimise functional impact.

Surgical Manipulation: Even when nerves are not directly involved by cancer, surgical manipulation, retraction, or thermal injury from cautery can cause temporary or permanent nerve dysfunction. Meticulous surgical technique minimises these risks.

Local Anaesthetic Effects: The local anaesthetic used during surgery can cause temporary numbness that extends beyond the immediate surgical site. This typically resolves within hours as the anaesthetic wears off, though some patients experience prolonged effects.

Post-Operative Swelling: Inflammation and oedema following surgery can compress nerves, causing temporary dysfunction. This typically improves as swelling subsides over the first few weeks.

Recognising Nerve Damage

The symptoms of nerve injury depend on whether sensory or motor nerves are affected:

Sensory Nerve Damage

Sensory nerve injury manifests as altered sensation in the area supplied by the affected nerve:

• Numbness: Complete loss of sensation in a specific area
• Paraesthesia: Abnormal sensations such as tingling, pins and needles, or burning
• Hyperaesthesia: Increased sensitivity to touch or temperature
• Dysaesthesia: Unpleasant or painful sensations in response to normal stimuli

Sensory changes immediately around the surgical site are common and expected. However, numbness extending well beyond the wound or affecting specific nerve distributions may indicate more significant injury.

Motor Nerve Damage

Motor nerve injury affects muscle function and is often more immediately apparent:

• Facial Asymmetry: Inability to move one side of the face normally, resulting in asymmetric smiling, eyebrow elevation, or eye closure
• Eyelid Dysfunction: Difficulty closing the eye completely (lagophthalmos) or drooping of the eyelid (ptosis)
• Lip Weakness: Difficulty with lip seal, drooling, or asymmetric lip movement
• Forehead Paralysis: Inability to raise the eyebrow or wrinkle the forehead on the affected side

Motor nerve injury requires immediate evaluation, as certain complications—particularly incomplete eye closure—can lead to corneal damage if not promptly addressed.

Facial Nerve Damage Risk by Location

Certain surgical locations carry higher nerve injury risk:

Temporal Region: The temporal branch of the facial nerve, which controls forehead movement and eyebrow elevation, runs superficially in this area and is vulnerable to injury during surgery in the temple region.

Cheek and Parotid Area: Multiple facial nerve branches traverse the cheek, controlling mid-face and lower face movement. Surgery in this region requires careful identification and preservation of these structures.

Lower Face and Jaw: The marginal mandibular branch of the facial nerve, which controls lower lip movement, runs along the jawline and can be injured during surgery in this area.

Periorbital Region: Surgery around the eyes risks injury to nerves controlling eyelid closure and sensation, with potential impact on eye protection and comfort.

Management and Recovery

The management of nerve damage Mohs depends on the type and severity of injury:

Observation: Most cases of temporary nerve dysfunction resolve spontaneously as swelling subsides and minor nerve trauma heals. Regular monitoring ensures recovery is progressing as expected.

Eye Protection: When eye closure is compromised, aggressive lubrication with artificial tears and ointments, protective eyewear, and sometimes temporary eyelid taping prevent corneal damage whilst nerve function recovers.

Physical Therapy: Facial exercises and neuromuscular retraining can facilitate recovery and prevent muscle atrophy during nerve regeneration.

Surgical Intervention: When nerve transection is identified or when recovery does not occur as expected, surgical options including nerve grafting, nerve transfer, or muscle transposition procedures may be considered to restore function.

Prognosis and Expectations

The prognosis for nerve recovery depends on injury severity and type. Temporary dysfunction from local anaesthetic, swelling, or minor trauma typically resolves within weeks to months. More significant injuries requiring nerve regeneration may take 6-12 months for maximal recovery. Complete nerve transection without repair generally results in permanent dysfunction, though reconstructive options can often improve function and appearance.

Mr. Patel’s approach to managing potential nerve damage combines preventive strategies during surgery, early recognition of complications, and comprehensive treatment plans tailored to each patient’s specific situation. His commitment to transparent communication ensures patients understand both risks and realistic expectations for recovery, whilst his surgical expertise minimises complications and optimises outcomes when nerve injury occurs.

Bleeding Complications: Prevention and Management

Bleeding complications Mohs surgery, whilst relatively uncommon, require prompt recognition and appropriate management to prevent more serious consequences. Understanding the factors that increase bleeding risk, recognising when bleeding is abnormal, and knowing how to respond enables patients to participate actively in preventing and managing this complication.

Normal Post-Operative Bleeding vs. Complications

Some degree of bleeding is normal following any surgical procedure. In the immediate post-operative period, minor oozing of blood-tinged fluid from the wound edges is expected and typically resolves within 24-48 hours as the initial clot stabilises and healing begins.

Problematic bleeding is characterised by:

• Continuous bleeding that saturates dressings repeatedly
• Bleeding that restarts after initially stopping
• Rapid swelling at the surgical site indicating blood accumulation beneath the skin
• Bleeding that does not respond to direct pressure
• Large clots forming at the wound site

The distinction between normal oozing and significant bleeding is not always clear, and patients should not hesitate to contact their surgical team with concerns. Early intervention prevents minor bleeding from progressing to haematoma formation or other complications.

Risk Factors for Bleeding Complications

Several factors increase the risk of post-operative bleeding:

Anticoagulant and Antiplatelet Medications

Medications that affect blood clotting represent the most significant risk factor for bleeding complications Mohs surgery. These include:

Anticoagulants: Warfarin, direct oral anticoagulants (DOACs) such as rivaroxaban, apixaban, and dabigatran, and heparin products reduce the blood’s ability to form clots. These medications are prescribed for serious conditions including atrial fibrillation, deep vein thrombosis, pulmonary embolism, and mechanical heart valves.

Antiplatelet Agents: Aspirin, clopidogrel, prasugrel, and ticagrelor prevent platelets from clumping together to form clots. These medications are commonly prescribed following heart attacks, strokes, or for patients with coronary stents.

The decision to continue or temporarily stop these medications before surgery requires careful consideration of the relative risks. For many patients, the risk of stopping anticoagulation (stroke, heart attack, or clot formation) exceeds the risk of bleeding during Mohs surgery. Mr. Patel works closely with patients and their cardiologists or haematologists to make individualised decisions that balance these competing risks.

Herbal Supplements and Over-the-Counter Medications

Many patients are unaware that common supplements and over-the-counter medications can increase bleeding risk:

• Fish oil and omega-3 fatty acids
• Vitamin E in high doses
• Ginkgo biloba
• Garlic supplements
• Ginger in large amounts
• Non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen and naproxen

Patients should provide a complete list of all medications, supplements, and herbal preparations during their pre-operative consultation. Many of these can be safely discontinued 7-10 days before surgery to reduce bleeding risk.

Medical Conditions Affecting

Frequently Asked Questions

What are the most common complications after Mohs surgery?

The most common complications after Mohs surgery include infection (1-3% of cases), bleeding, scarring, and temporary nerve damage. While Mohs surgery has the highest cure rate for skin cancer with minimal tissue removal, all surgical procedures carry some risk. Most complications are minor and resolve with appropriate care. Serious complications are rare when the procedure is performed by an experienced surgeon and patients follow post-operative instructions carefully.

How can I tell if my wound is infected after Mohs surgery?

Signs of infection after Mohs surgery include increasing pain after initial improvement, expanding redness beyond the incision site, purulent (yellow/green) discharge, fever above 38°C (100.4°F), and increased swelling after the first few days. Normal healing involves mild discomfort that improves daily, stable redness immediately around the incision, and decreasing swelling after 2-3 days. If you notice these warning signs, contact your surgeon immediately as early intervention significantly improves outcomes.

Will I have a noticeable scar after Mohs surgery?

All surgery produces some scarring, but Mohs surgery is designed to minimize scarring while completely removing skin cancer. The visibility of your scar depends on several factors including the size and location of the cancer, your skin type, age, and how well you follow post-operative care instructions. Scars typically improve significantly over 12-18 months, becoming flatter, softer, and lighter in colour. Various treatments including silicone sheets, sun protection, scar massage, and advanced procedures can optimize the final appearance of your scar.

How can I minimize complications after Mohs surgery?

To minimize complications after Mohs surgery, follow these key steps:

• Follow all wound care instructions precisely
• Keep the wound clean and protected as directed
• Avoid strenuous activity for at least 1-2 weeks
• Don’t smoke, as it impairs healing and increases infection risk
• Apply sun protection to the healed wound for at least 12 months
• Attend all follow-up appointments
• Contact your surgeon promptly if you notice signs of infection or unusual bleeding

Patients who adhere to these guidelines typically experience uncomplicated healing and optimal aesthetic results.

When should I contact my surgeon after Mohs surgery?

Contact your surgeon immediately if you experience increasing pain after initial improvement, spreading redness, purulent drainage, fever above 38°C (100.4°F), bleeding that doesn’t stop with gentle pressure, or wound separation. While some discomfort, mild redness around the incision, and slight drainage are normal in the first few days, worsening symptoms require prompt evaluation. I maintain accessible communication channels throughout your recovery period to address any concerns quickly and prevent minor issues from progressing to serious complications.