Clinical Guides
Warts (Verrucae)
An India-contextualised, clinically focused guide to recognising common warts and verrucae, choosing observation or treatment, protecting sensitive sites and avoiding caustic or unproven home remedies.
MedNext Academy | 12 min read
Warts (Verrucae)
An India-contextualised, clinically focused guide to recognising common warts and verrucae, choosing observation or treatment, protecting sensitive sites and avoiding caustic or unproven home remedies.
Summary
Warts, or verrucae, are usually benign epidermal proliferations associated with human papillomavirus (HPV). A rough papule on a hand or foot is often recognisable clinically, but a wart is not a licence for blind destruction: site, morphology, duration, pain, immune status and the possibility of a mimic matter. Many common and plantar warts resolve spontaneously, particularly in children, so observation with protection from picking is a legitimate treatment plan. [BAD 2014]
If treatment is wanted because of pain, functional interference, spreading, recurrent trauma or unacceptable burden, salicylic-acid keratolysis and clinician-delivered cryotherapy are commonly used options. They require patience and careful protection of surrounding skin; neither guarantees clearance, and recurrence can occur. Avoid cutting, burning, tying off, acid mixtures, internet remedies, bleach, garlic or agricultural chemicals. These can cause burns, infection, scarring and diagnostic delay. Do not use an over-the-counter wart product on the face, genitals, a mole, broken skin, a diabetic foot or an area with poor circulation without clinical advice. [current guidelines (2025)]
Genital or atypical lesions need a different pathway from a hand wart. Pregnancy, immunosuppression, facial or periocular disease, bleeding, ulceration, rapid growth, severe pain or diagnostic uncertainty lower the threshold for examination and referral. This guide supports education, not an individual diagnosis or prescription.
How Common Is It?
Warts are common worldwide and are particularly frequent in school-aged children and young people. Transmission is through direct contact or contaminated surfaces, but exposure does not mean that every contact develops a wart. Minor breaks in the skin, damp communal floors, nail biting and scratching can facilitate inoculation or spread to another site. Plantar warts may hurt because pressure pushes the lesion inward; periungual warts can disrupt nails and are easy to traumatise. [current guidelines (2025)]
The clinical course is variable. Some lesions flatten over months, while others persist for years, especially on the soles or in people with impaired immune responses. Spontaneous resolution should not be promised by a fixed deadline. A child with a typical, painless wart may need only reassurance, covering for sport or swimming, and advice not to bite, pick or share nail tools. School exclusion is generally unnecessary; sensible hygiene is more useful than stigma. [BAD 2014]
Indian practice spans home care, primary health centres, pharmacies, dermatology clinics and tertiary hospitals. Access to liquid nitrogen, dermoscopy and biopsy varies, and products labelled for warts may be adulterated or inappropriate for sensitive skin. A good consultation therefore records the actual site and product available, explains what observation means, and gives a return plan. Household members should not be blamed: common warts are ubiquitous and are not evidence of poor hygiene or sexual behaviour.
Risk Factors
Risk is increased by skin trauma, nail biting, shaving over lesions, eczema or other barrier disruption, and repeated wet exposure such as swimming pools or shared bathing areas. Autoinoculation follows scratching, cutting or shaving, so a patient who keeps treating multiple spots may be creating new lesions. Warts around the nails can be stubborn because manipulation damages the nail fold and spreads virus. [current guidelines (2025)]
Immune suppression changes the risk assessment. People living with HIV, receiving transplant medicines, chemotherapy or prolonged immunosuppression may develop numerous, large, persistent or treatment-resistant warts; an atypical lesion may also require biopsy because malignancy or a different infection can resemble a wart. Do not stop steroids, biologics or transplant medicines independently. Review immune status confidentially and coordinate with the treating team. [CDC 2021]
Diabetes, peripheral vascular disease, neuropathy and poor wound healing make self-applied acids or freezing hazardous, particularly on the foot. Pregnancy changes the medicine and procedure discussion: do not use podophyllotoxin, podophyllin or other genital-wart medicines casually, and do not assume a common hand-wart product is safe. Facial and periocular skin is thin and cosmetically important. Occupation, footwear, pain, sport, school and treatment preference are practical risk modifiers. Risk factors guide counselling; they do not prove that a lesion is a wart.
Diagnosis
History
Ask when the lesion appeared, whether it is changing, painful or bleeding, and whether there are similar lesions elsewhere or affected household contacts. Clarify location, pressure-related pain, nail change, itch, discharge, fever and prior treatments, including acids, cutting, freezing, herbal products or pharmacy preparations. Ask about eczema, diabetes, neuropathy, circulation, HIV or other immunosuppression, pregnancy possibility and medicines. For anogenital lesions, use confidential, non-judgmental sexual-health history and assess whether the lesion could be a sexually transmitted infection.
Examination
Inspect number, distribution, surface, colour, borders, tenderness and relationship to nails, skin creases, mucosa and the eye. Common warts are usually hyperkeratotic papules; plantar lesions may interrupt skin lines and show thrombosed capillary dots after paring by a trained clinician. Check for callus, ulceration, pigment, induration, rapid growth, bleeding, inflammation and secondary infection. Examine the whole skin and nails when spread or immune compromise is possible. Never casually pare a pigmented, ulcerated or diagnostically uncertain lesion.
Investigations
Typical warts need no laboratory test. Dermoscopy can help when available, but it does not replace clinical judgement. Biopsy or specialist assessment is appropriate for atypical, persistent, refractory, rapidly growing, bleeding, pigmented, ulcerated or immunocompromised lesions, and for cervical or anal lesions where dysplasia must be excluded. Test for other conditions only when history and examination support them; do not order broad HPV testing for an ordinary hand wart.
Differential Diagnosis
The differential depends on site and appearance. A plantar wart can resemble a corn or callus: pressure pain, skin-line changes and capillary dots may help, but paring should be performed safely. A molluscum lesion is usually smooth and umbilicated rather than rough. Seborrhoeic keratosis, actinic keratosis, verruca-like squamous neoplasia, keratoacanthoma, foreign body granuloma and inflammatory dermatoses may mimic a wart in an adult. Pigmented, indurated, bleeding or ulcerated lesions must not be repeatedly frozen without reconsidering the diagnosis.
On the face, filiform papules, sebaceous lesions, milia and syringomas may be confused with warts; destructive treatment can leave a visible scar. Around the nail, chronic paronychia, fungal disease and trauma are alternatives. In the genital area, condyloma lata, molluscum, vestibular papillomatosis, benign naevi, herpes, skin tags, inflammatory disease and intraepithelial neoplasia require appropriate examination. A genital wart is not the same as a common hand wart and should not be treated with consumer salicylic acid.
In an immunocompromised person, extensive or resistant lesions can coexist with dysplasia or infection. Diagnostic uncertainty is itself a reason to refer. If a treatment has produced a burn, ulcer or persistent inflammation, pause further applications, document the product and assess injury rather than labelling the reaction as worsening wart disease.
Management
Observation is reasonable for a typical, asymptomatic wart when the patient understands the likely slow course and return precautions. Protect it from picking, nail biting and shaving; keep feet dry, avoid sharing towels or nail instruments, and cover a lesion during activities where friction or direct contact is likely. Do not promise that covering alone eliminates transmission. Treat eczema or fissures that undermine the skin barrier. [BAD 2014]
When treatment is chosen, salicylic acid is a keratolytic option with evidence of benefit over placebo in some common and plantar warts. It usually requires regular application over weeks, soaking and gentle removal of softened dead tissue according to the product instructions. Stop if marked pain, ulceration, spreading redness or an unexpected reaction occurs. Protect normal skin and never apply it to the face, genitals, moles, broken skin or a high-risk foot without advice. [Cochrane 2012]
Cryotherapy uses liquid nitrogen and should be delivered by a trained clinician. It may be painful, blister and alter pigment; repeated sessions may be needed and benefit is not uniform across sites. Discuss observation, salicylic acid, cryotherapy and the possibility of no immediate clearance. Refractory disease can be referred for specialist options; more destructive treatment is not automatically better. Clean technique, consent, realistic expectations and follow-up matter more than a dramatic first procedure.
Prescribing Information
Most common warts do not require an oral medicine, antibiotic or antiviral. If a patient has only a typical, uncomplicated lesion, documenting observation is safer than prescribing a marginal treatment. Over-the-counter salicylic-acid products differ in strength and formulation; verify the local product label, age restrictions and site warnings rather than importing a foreign regimen. Apply only to the wart, protect surrounding skin, and stop for significant irritation. People with diabetes, neuropathy, ischaemia or poor healing need clinician advice before any keratolytic foot treatment.
Cryotherapy is a procedure, not a take-home prescription. Explain pain, blistering, pigment alteration, infection and incomplete response. Do not prescribe antibiotics for a wart unless there is a clinically diagnosed bacterial infection. Avoid caustic compounds, podophyllin, bleach, acids of unknown concentration, kerosene, garlic, toothpaste and unregulated “wart removers”; a burn can obscure cancer and requires treatment in its own right.
Genital-wart medicines are site-specific and should follow a current sexual-health or dermatology protocol. Podofilox, podophyllin and sinecatechins should not be used in pregnancy; imiquimod is generally avoided until better pregnancy data are available. [CDC 2021] Do not use genital preparations on the face or common-wart preparations on mucosa. Check pregnancy, immunosuppression, lesion type, condom or diaphragm effects, and partner counselling before treatment. No prescription removes the need for cervical screening or evaluation of suspicious lesions.
When to Refer
Refer to dermatology for diagnostic uncertainty, a lesion on the face or eyelid, recurrent or extensive disease, severe pain, nail destruction, failed sensible first-line care, or a lesion that is pigmented, ulcerated, indurated, bleeding or rapidly growing. Refer a patient with diabetes, neuropathy, peripheral arterial disease or poor healing before treating a foot lesion with acid or cryotherapy. A referral should include photographs only with consent, exact sites, duration, morphology, immune status, pregnancy status and previous products or procedures.
Genital, anal, cervical, urethral or vaginal lesions require sexual-health, gynaecology, urology, colorectal or dermatology input according to anatomy. Do not use consumer wart paint on mucosa. Suspicious cervical or anal lesions need specialist examination and biopsy pathways rather than empiric repeated freezing. Discuss STI testing sensitively when indicated; do not equate a genital wart with recent transmission or infidelity. [CDC 2021]
Immunocompromised patients need a lower threshold for biopsy and coordinated care. The specialist should consider dysplasia, treatment resistance, immune status and medicine interactions. In India, referral may be to a district hospital, medical-college dermatology clinic or tertiary sexual-health service; document travel, cost and interim skin protection. Urgent referral is appropriate for rapidly progressive ulceration, spreading cellulitis, severe tissue injury, ocular involvement or systemic illness.
Red Flags
Urgent clinical assessment is needed for severe pain with rapidly spreading redness, warmth, pus, fever, lymphangitis, tissue necrosis or inability to walk. A painful foot lesion in a person with diabetes, neuropathy or ischaemia may be an infected wound rather than a simple wart. Stop home treatment and seek care after a chemical burn, deep blister, bleeding that does not settle, or injury near the eye.
Diagnostic red flags include rapid growth, spontaneous bleeding, ulceration, marked induration, irregular pigmentation, a solitary new lesion in an older adult, failure to respond after a well-supervised plan, or a lesion that looks unlike the patient’s other warts. In people with HIV, cancer therapy, transplant or other immune suppression, numerous, giant, atypical or treatment-resistant lesions deserve specialist assessment and often biopsy. [CDC 2021]
Pregnancy is a medicine-safety red flag for anogenital treatment, not a reason for panic. Seek obstetric and specialist advice before applying genital-wart medicines or performing elective destruction. A periocular lesion, visual symptom or lesion involving the eyelid margin requires eye-aware assessment. The practical red flag is escalating home experimentation: remove the product, bring its packaging, and assess the skin and diagnosis before another application.
Do not let a reassuring label override a changing lesion. Cancer, inflammatory disease, infection and trauma can all be hidden by repeated wart treatment.
Indian Clinical Context
Indian patients may first seek advice from a pharmacy, local practitioner, beauty clinic or family remedy, so ask explicitly what has already been applied. Unlabelled acids, plant extracts, podophyllin mixtures and physical burning are not safer because they are inexpensive. Explain in the preferred language that observation is active care: protect the lesion, avoid spread, monitor change and return if warning signs appear. Provide a realistic follow-up route through a Health and Wellness Centre, primary health centre, district hospital or medical-college dermatology service.
Liquid nitrogen and dermoscopy may not be available outside referral centres. The safe alternative is not a stronger acid; it is conservative skin care and an organised referral. People with diabetes, leprosy-related neuropathy, peripheral vascular disease or limited transport need foot protection and a clear plan that accounts for delayed wound review. Maintain dignity around genital lesions and offer confidential services; do not promise that a procedure proves cure or prevents HPV transmission.
HPV vaccination is a prevention discussion, not treatment for an existing common wart. Follow current Indian National Immunisation Schedule and local adolescent or risk-based guidance, with shared decision-making where private vaccination is considered. Cervical screening follows national age- and programme-specific guidance and is not replaced by treating visible warts. Public advice should discourage school exclusion and stigma while supporting hand hygiene, footwear in communal wet areas and no sharing of personal tools.
NMC Competency Mapping
This guide supports supervised learning in Dermatology, Community Medicine, Pharmacology, Microbiology, Surgery, Obstetrics and Gynaecology, and AETCOM. The learner should describe common wart morphology, distinguish observation from treatment failure, identify high-risk sites, and explain why a wart-like lesion may need biopsy. Exact competency codes should be checked against the institution’s current NMC curriculum ledger rather than guessed in a public guide. [NMC 2024]
A clinical station should assess history of duration, pain, trauma, previous remedies, immune status, diabetes, pregnancy and sexual-health context when relevant. Examination should include lesion distribution, nail and foot risk, skin integrity and red flags. A prescribing station should test site-specific safety: keratolytics are not for mucosa or high-risk feet, cryotherapy is clinician-delivered, antibiotics are not routine, and genital medicines require pregnancy and specialist safeguards.
Professional conduct includes consent before examination or photography, non-stigmatising language, confidentiality for genital lesions, safeguarding where relevant, and a safety-net plan. The student should communicate uncertainty and refer rather than perform repeated destructive treatment. Indian practice learning should include resource-aware alternatives, pharmacy counselling and attention to affordability, language and travel. The endpoint is safe triage and patient-centred care, not cosmetic clearance at any cost.
Key Exam Pearls for NEET PG
Common warts are HPV-associated hyperkeratotic papules; plantar warts may be painful on pressure and can show thrombosed capillary dots after safe paring. Skin lines tend to be interrupted over a wart, whereas a callus generally preserves them. The diagnosis is usually clinical, but a changing, pigmented, ulcerated or refractory lesion requires reconsideration and sometimes biopsy.
Observation is evidence-based because spontaneous clearance occurs, especially in children. Salicylic acid is a practical keratolytic requiring repeated careful use; cryotherapy is provider-delivered, painful and not uniformly superior. Do not confuse a treatment choice with a guarantee of cure. Do not apply consumer salicylic acid to face, genitals, moles, broken skin or a diabetic or ischaemic foot.
Genital warts follow an STI/sexual-health pathway. Podofilox, podophyllin and sinecatechins are avoided in pregnancy; genital mucosal disease, cervical disease and intra-anal disease need appropriate specialist assessment. HIV or other immunosuppression may produce larger, more numerous, recurrent lesions and raises concern for dysplasia. [CDC 2021]
Exam traps are treating every wart, prescribing antibiotics without infection, assuming a wart-like lesion is benign, and recommending garlic, bleach or burning. The safest answer often combines diagnostic review, observation, skin protection and a referral trigger.
Frequently Asked Questions
Can I leave a common wart untreated?
Often yes, if it is typical, painless and the person is otherwise well. Explain that clearance can take months or longer, avoid picking and sharing instruments, protect the lesion during friction, and arrange review if it changes, spreads, bleeds or becomes painful. Observation is not neglect; it avoids unnecessary burns and scars.
Is salicylic acid safe for every wart?
No. Products are site- and patient-specific. Do not use consumer acid on the face, genitals, moles, broken skin or a diabetic, neuropathic or poorly perfused foot without clinical advice. Follow the local label, protect normal skin and stop for ulceration, marked pain, infection or an unexpected reaction.
Should a genital wart be treated like a hand wart?
No. Genital, anal, cervical, urethral and vaginal lesions need appropriate examination and often sexual-health or specialist care. Common-wart paint can injure mucosa, and pregnancy changes medicine choices. Discuss confidentiality, other STI assessment when indicated and partner information without implying blame or recent transmission.
When does a wart-like lesion need biopsy or referral?
Refer when the diagnosis is uncertain or the lesion is rapidly growing, pigmented, ulcerated, indurated, bleeding, unusually painful, refractory, facial, periocular, extensive or in an immunocompromised person. Repeated freezing of a changing lesion can delay recognition of cancer, inflammatory disease or infection.
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