Warts
Warts are small, non-cancerous skin growths caused by a viral infection in the top layer of the skin. They are common, contagious, and typically resolve on their own, though treatment can speed up removal.
Overview
Warts are small, non-cancerous skin growths caused by a viral infection in the top layer of the skin. They are common, contagious, and typically resolve on their own, though treatment can speed up removal.
Understand this condition
The human papillomavirus enters the outer layer of skin through tiny breaks or scratches. It forces the skin cells to multiply rapidly, creating a hard lump of protein called keratin. This localized overgrowth of skin forms the visible wart on the surface.
Why it happens
The virus hijacks the skin's growth cycle, causing the epidermis to thicken and harden. Triggers include skin trauma, moisture, and a local immune system that fails to recognize the virus. Warts typically grow slowly and may shed viral particles, leading to new clusters nearby.
Real-world scenarios
- •This often appears as a rough, flesh-colored bump on a child's finger.
- •People may notice small, black dots on the soles of their feet.
- •This often appears as flat, brownish patches on the face or legs.
- •People may notice clusters of small, grainy bumps around their fingernails.
Common vs serious explanations
- •Typical viral skin infection
- •Excessive friction or pressure on hands or feet
- •Benign skin growths common in childhood
- Squamous cell carcinoma of the skin
- Malignant melanoma appearing as a dark growth
- Genital HPV infection requiring specialized care
- Atypical mole syndrome
Symptoms
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Causes
- •Human papillomavirus (HPV) infection
- •Skin-to-skin contact with infected person
- •Touching contaminated surfaces (towels, gym floors)
Risk factors
- •Children and young adults
- •Weakened immune system
- •Biting fingernails or picking cuticles
- •Walking barefoot in communal showers or locker rooms
How it progresses
3 stages- OnsetSymptoms appear, often triggered by a known cause.Often missed
- Active phaseSymptoms peak; self-care or short treatment usually helps.
- ResolutionSymptoms ease over days to weeks with proper care.
How it's diagnosed
- •Visual physical examination
- •Skin scraping (debridement)
- •Skin biopsy (not common)
Treatment options
General educational information only — no dosage advice. Always follow guidance from a qualified clinician.
- •Cryotherapy (freezing with liquid nitrogen)
- •Cantharidin (blistering agent)
- •Minor surgery or electrosurgery
- •Laser treatments for persistent warts
- •Over-the-counter salicylic acid treatment
- •Duct tape occlusion method witness
- •Keeping warts dry and covered
- •Avoid picking or scratching at growths
Complications
- •Reduced quality of life
- •Worsening symptoms over time
- •Recurrence of warts
Prevention
- •Maintain a healthy lifestyle
- •See a clinician for routine check-ups
When to seek help
- •Symptoms persist beyond a few days
- •Symptoms interfere with daily activities
- •New or worsening symptoms appear
- •Concerning changes related to warts
- Signs of infection (pus, redness, red streaks)
- Bleeding or rapid changes in shape/color
- Pain that interferes with daily activity
- Genital or facial growths requiring specialist care
In any emergency, call your local emergency number or go to the nearest emergency department.
Real-world questions
- ›Can Warts cause headaches?
- ›Is Warts reversible?
- ›How quickly does Warts progress?
- ›Is Warts hereditary?
- ›Can Warts be prevented?
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Frequently asked questions
Possible causes of Warts include Human papillomavirus (HPV) infection, Skin-to-skin contact with infected person, Touching contaminated surfaces (towels, gym floors).
Warts is generally mild, but severity can vary. Seek care if symptoms are severe or persistent.
Duration varies between individuals. Many cases improve with appropriate care, while others may persist longer and require ongoing management.
Some milder cases may improve with rest and self-care. If symptoms persist or worsen, consult a healthcare professional.
Consider seeing a clinician if symptoms are severe, persistent, worsening, or if you have any concerns related to general.
Sources
Information based on general medical references such as:
Last reviewed: May 2026