Warts

Warts are small, usually painless growths on the skin. Most of the time, they are harmless. They are caused by a virus called human papillomavirus (HPV). There are more than 150 types of HPV viruses. Some types of warts are spread through sex.

Causes

All warts can spread from one part of your body to another. Warts can spread from person to person by contact, especially sexual contact.

Symptoms

Most warts are raised and have a rough surface. They may be round or oval.

• The spot where the wart is may be lighter or darker than your skin. In rare cases, warts are black.
• Some warts have smooth or flat surfaces.
• Some warts may cause pain.

Different types of warts include:

• Common warts often appear on the hands, but they can grow anywhere.
• Flat warts are generally found on the face and forehead. They are common in children. They are less common in teens, and rare in adults.
• Genital warts usually appear on the genitals, in the pubic area, and in the space between the thighs. They can also appear inside the vagina and anal canal.

  Genital warts

  Genital warts are soft growths on the skin and mucous membranes of the genitals. They may be found on the penis, vulva, urethra, vagina, cervix, and...

   

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• Plantar warts found on the soles of the feet. They can be very painful. Having many of them on your feet may cause problems walking or running.
• Subungual and periungual warts appear under and around the fingernails or toenails.
• Mucosal papillomas occur on mucous membranes, mostly in the mouth or vagina, and are white.

Exams and Tests

Your health care provider will look at your skin to diagnose warts.

You may have a skin biopsy to confirm the wart is not another type of growth, such as skin cancer.

Skin biopsy

A skin lesion biopsy is when a small amount of skin is removed so it can be examined under a microscope. The skin is tested to look for skin conditi...

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Treatment

Your provider can treat a wart if you do not like how it looks or if it is painful.

DO NOT attempt to remove a wart yourself by burning, cutting, tearing, picking, or by any other method.

MEDICINES

Over-the-counter medicines are available to remove warts. Ask your provider which treatment is right for you.

DO NOT use over-the-counter wart medicines on your face or genitals. Warts in these areas need to be treated by a provider.

To use wart-removal medicine:

• File the wart with a nail file or emery board when your skin is damp (for example, after a shower or bath). This helps remove dead tissue. Do not use the same emery board on your nails.
• Put the medicine on the wart every day for several weeks or months. Follow the instructions on the label.
• Cover the wart with a bandage.

OTHER TREATMENTS

Special foot cushions can help ease the pain from plantar warts. You can buy these at drugstores without a prescription. Use socks. Wear shoes with plenty of room. Avoid high heels.

Your provider may need to trim away thick skin or calluses that form over warts on your foot or around nails.

Your provider may recommend the following treatments if your warts do not go away:

• Stronger (prescription) medicines
• A blistering solution
• Freezing the wart (cryotherapy) to remove it

  Cryotherapy

  Cryotherapy is a method of superfreezing tissue in order to destroy it. This article discusses cryotherapy of the skin.

   

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• Burning the wart (electrocautery) to remove it

  Electrocautery

  Electrocauterization is the process of heating tissue with electricity.

   

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• Laser treatment for difficult-to-remove warts
• Immunotherapy, which gives you a shot of a substance that causes an allergic reaction and helps the wart go away
• Imiquimod, which is applied to warts

Genital warts are treated in a different way than most other warts.

Outlook (Prognosis)

Most often, warts are harmless growths that go away on their own within 2 years. Periungual or plantar warts are harder to cure than warts in other places. Warts can come back after treatment, even if they appear to go away. Minor scars can form after warts are removed.

Infection with certain types of HPV can increase cancer risk, most commonly cervical cancer in women. This is most common with genital warts. To decrease the risk for cervical cancer in women, a vaccine is available. Your provider can discuss this with you.

When to Contact a Medical Professional

Contact your provider if:

• You have signs of infection (red streaking, pus, discharge, or fever) or bleeding.
• You have a lot of bleeding from the wart or bleeding that does not stop when you apply light pressure.
• The wart does not respond to self-care, and you want it removed.
• The wart causes pain.
• You have anal or genital warts.
• You have diabetes or a weakened immune system (for example, from HIV) and have developed warts.
• There is any change in the color or appearance of the wart.

Prevention

To prevent warts:

• Avoid direct contact with a wart on another person's skin. Wash your hands carefully after touching a wart.
• Wear socks or shoes to prevent getting plantar warts.
• Use condoms to reduce transmission of genital warts.
• Wash the nail file that you use to file your wart so that you don't spread the virus to other parts of your body.
• Ask your provider about vaccines to prevent some types or strains of viruses that cause genital warts.

  Vaccines

  The human papillomavirus (HPV) vaccine protects against infection by certain strains of HPV. HPV can cause cervical cancer and genital warts. HPV ha...

   

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• Ask your provider about screening for precancerous lesions, such as by Pap smear.

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