Common Warts

Overview

Common warts (verruca vulgaris) are non-cancerous skin growths caused by the human papillomavirus (HPV). They appear as small, rough, and raised bumps on the skin, most frequently on the hands, fingers, and around the nails. While they are generally harmless and often resolve on their own, they can be bothersome and sometimes painful.

Warts are highly contagious and can spread through direct skin-to-skin contact or by touching contaminated surfaces such as shared towels, floors, or doorknobs. The virus enters the skin through small cuts, breaks, or scratches, causing the top layer of skin to grow rapidly.

Common warts typically appear on hands and fingers as rough, grainy growths.

Most common warts are cosmetic concerns rather than serious health threats. However, they can spread to other parts of the body or to other people, and some may become painful if they develop in areas of pressure or friction. Understanding the symptoms, causes, and treatment options is essential for effective management.

Symptoms

Common warts are characterized by a rough, grainy appearance, with a dome-shaped or flat top. They may have tiny black dots (clotted blood vessels) and are often painless. Symptoms may include:

• Rough, grainy texture — The surface of a wart feels like a small, rough bump or a tiny cauliflower-like growth.
• Dome-shaped or flat-topped growths — Warts are typically raised, firm, and skin-colored or slightly darker than the surrounding skin.
• Tiny black dots — These are clotted blood vessels visible as tiny dark specks within the wart.
• Pain or tenderness — Warts can be painful if they develop in areas of pressure or friction, such as the soles of the feet.
• Multiple warts — Warts can spread to nearby skin, forming clusters or groups.
• Skin-colored or slightly darker growths — Warts may appear gray, brown, or pinkish.

Common warts often have a rough, cauliflower-like surface with tiny black dots.

Most common warts appear on the hands, fingers, and around the nails, but they can also occur on the feet (plantar warts), knees, face, and other parts of the body. They are usually painless unless they develop in areas of pressure or friction.

Causes

Common warts are caused by the human papillomavirus (HPV), a group of viruses that infect the skin and mucous membranes. The virus enters the skin through small cuts, breaks, or scratches, causing the top layer of skin to grow rapidly and form a wart.

HPV is highly contagious and can be transmitted through:

• Direct skin-to-skin contact — Touching a wart on another person can spread the virus.
• Indirect contact — Sharing towels, razors, or other personal items, or walking barefoot on contaminated floors (particularly in communal showers or swimming pools).
• Self-infection — Scratching or picking at a wart can spread the virus to other parts of your own body.

HPV enters the skin through small cuts or breaks, causing warts to develop.

Risk factors for developing common warts include:

• Age — Children and young adults are more susceptible.
• Weakened immune system — People with weakened immunity are more likely to develop warts.
• Damaged skin — Cuts, scratches, or other skin damage provide entry points for the virus.
• Communal environments — Shared showers, swimming pools, and gymnasiums increase the risk.
• Personal habits — Biting nails or picking at hangnails can create openings for the virus.

Treatment

Many warts resolve on their own without treatment, especially in children. However, treatment may be recommended if warts are painful, spreading, or causing cosmetic concerns. Treatment options include:

• Over-the-counter salicylic acid — Applied daily to the wart, this medication gradually removes the wart layer by layer. It may take several weeks to months to see results.
• Cryotherapy (freezing) — Liquid nitrogen is used to freeze the wart, causing it to blister and eventually fall off. This is a common in-office procedure.
• Prescription topical treatments — Stronger medications such as cantharidin or imiquimod may be prescribed by a healthcare provider.
• Minor surgery — In persistent cases, a healthcare provider may remove the wart by cutting it away or using laser treatment.
• Laser treatment — Laser therapy can be used for stubborn or recurrent warts.
• Observation — Since many warts resolve spontaneously, especially in children, watchful waiting is a reasonable option for non-problematic warts.

Treatment options include salicylic acid, cryotherapy, and other professional procedures.

It is important to avoid picking at or scratching warts, as this can spread the virus to other areas of the skin. Keep warts covered and maintain good hand hygiene to prevent transmission. If over-the-counter treatments are ineffective or warts are painful or spreading, consult a healthcare provider for professional evaluation and treatment.

When to See a Doctor

While common warts are generally harmless and often resolve on their own, you should see a doctor if:

• The warts are painful or interfere with daily activities.
• Warts change in appearance (color, shape, or size).
• Warts don't respond to home treatment after several weeks or months.
• Warts are spreading rapidly or forming large clusters.
• Warts appear on the face, genitals, or other sensitive areas.
• You have a weakened immune system or diabetes.
• You are unsure whether the growth is a wart or another type of skin lesion.

Consult a healthcare provider if warts are painful, spreading, or not responding to home treatment.

A healthcare provider can accurately diagnose warts and recommend appropriate treatment. In some cases, a skin biopsy may be performed to rule out other skin conditions. Early evaluation and treatment can help prevent the spread of warts and reduce the risk of complications.