HEALTH ENCYCLOPEDIA

Diseases & Conditions A - Z
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Warts

What are warts?

Warts are raised bumps on your skin caused by the human papillomavirus (HPV). Warts have plagued humans for thousands of years — they have been discovered on 3,000-year-old mummies and were mentioned by Shakespeare. Although warts are generally not dangerous, they are ugly, potentially embarrassing, contagious, and they can be painful.

Important information about genital warts

There are more than 100 types of HPV, the virus that causes warts. Almost all types of HPV cause relatively harmless warts that appear on your hands or feet. However, there are a few strains of HPV that cause warts on, in, and around your genitals. In women, these warts — called “genital warts” — can eventually lead to cervical cancer, a potentially fatal disease. If you think you have genital warts or think you have been exposed to them, you should see a doctor right away.

What are the types of warts?

There are five major types of warts. Each type appears on a different part of the body and has a distinct appearance.

Common Warts

Common warts usually grow on your fingers and toes but can appear elsewhere. They have a rough, grainy appearance and a rounded top. Common warts are grayer than the surrounding skin.

Plantar Warts

Plantar warts grow on the soles of the feet. Unlike other warts, plantar warts grow into your skin, not out of it. You can tell if you have a plantar wart if you notice what appears to be a small hole in the bottom of your foot that is surrounded by hardened skin. Plantar warts can make walking uncomfortable.

Flat Warts

Flat warts usually grow on the face, thighs, or arms. They are small and not immediately noticeable. Flat warts have a flat top, as if they have been scraped. They can be pink, brownish, or slightly yellow.

Filiform Warts

Filiform warts grow around your mouth or nose and sometimes on your neck or under your chin. They are small and shaped like a tiny flap or tag of skin. Filiform warts are the same color as your skin.

Periungual Warts

Periungual warts grow under and around the toenails and fingernails. They can be painful and affect nail growth.

When should I see a doctor?

You should see your doctor if:

  • you have warts on your face or another sensitive part of your body (e.g., genitals, mouth, nostrils)
  • you notice bleeding or signs of infection, such as pus or scabbing, around a wart
  • the wart is painful
  • the color of the wart changes
  • you have warts and diabetes or an immune deficiency, such as HIV/AIDS

Can I treat warts at home?

Although warts usually go away on their own, they are ugly and uncomfortable, so you may want to try treating them at home. Many warts respond well to treatments available at the drugstore.

Some things to remember:

  • You can spread warts to other parts of your body, and they are contagious to others. If a treatment requires that you rub the wart with a fingernail file or a pumice stone, do not use that utensil on any other part of your body, and do not allow anyone else to use it.
  • Do not try to treat warts on your feet if you have diabetes. See your doctor. Diabetes can cause loss of sensation in your feet, so you can easily injure yourself without realizing it.
  • Do not try to remove warts on your face or another sensitive part (such as genitals, mouth, or nostrils) of your body with at-home treatments.

Freezing Treatments

These treatments spray concentrated cold air (usually liquid nitrogen) onto your wart. This kills the skin and allows you to scrape away the surface of the wart. These treatments are a good choice if you want to try to remove a wart quickly, but they are not strong enough to remove all warts.

Treatments and Patches Containing Salicylic Acid

You must use these products every day, often for a few weeks. They will work best if you soak the wart in water for about 15 minutes before you apply the treatment.

Duct Tape

Some people have had success treating warts with duct tape. The process involves covering the wart with a small piece of duct tape for several days, then soaking the wart, and, finally, rubbing the wart to remove the dead skin. This approach can take several rounds of treatments to work.

What can my doctor do about warts?

If your wart does not respond well to at-home treatments, your doctor may be able to help. Remember, always see your doctor if you have diabetes and have warts on your feet.

Liquid Nitrogen

Your doctor may freeze your wart with liquid nitrogen. This can be a bit painful but usually works well. More than one treatment may be required. Freezing causes a blister to form under and around your wart. This lifts the wart away from the skin within about a week.

Surgery

Surgery is usually only considered if a wart has not responded to other treatments. Your doctor can cut away your wart with a surgical knife or burn it with electricity. You’ll need to receive a shot of anesthetic first, and these shots can be painful. Surgery may also cause scarring.

Can warts be prevented?

There are ways to prevent warts and keep them from spreading to other parts of your body if you already have one. Follow these simple guidelines:

  • Wash your hands regularly, especially if you have been in contact with someone with warts.
  • Don’t pick at your warts.
  • Cover warts with a bandage.
  • Keep your hands and feet dry.
  • Wear shower shoes (flip-flops) when in a locker room or communal bathing facility.

Content licensed from:

Written by: Elea Carey
Published on: Jul 12, 2012
Medically reviewed on: Apr 20, 2017: Debra Sullivan, PhD, MSN, RN, CNE, COI

This feature is for informational purposes only and should not be used to replace the care and information received from your health care provider. Please consult a health care professional with any health concerns you may have.
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