Warts

Are Warts Contagious?

Simply touching a wart on someone doesn't guarantee that you'll get one, too. But the viruses that cause warts are passed from person to person by close physical contact or from a surface that a person with a wart touches, like a bathmat or a shower floor. (You can't, however, get a wart from holding a frog or toad, as kids sometimes think!)

A tiny cut or scratch can make any area of skin more vulnerable to warts. Also, picking at a wart can spread warts to other parts of the body.

The length of time between when someone is exposed to the virus that causes warts and when a wart appears varies. Warts can grow very slowly and may take weeks or longer, in some cases, to develop.

Preventing Warts

Although there's no way to prevent warts, it's always a good idea to encourage kids to wash their hands and skin regularly and well. If your child has a cut or scratch, use soap and water to clean the area because open wounds are more susceptible to warts and other infections.

It's also wise to have kids wear waterproof sandals or flip-flops in public showers, locker rooms, and around public pools (this can help protect against plantar warts and other infections, like athlete's foot).

Treating Warts

Warts don't generally cause any problems, so it's not always necessary to have them removed. Without treatment, it can take anywhere from 6 months to 2 years for a wart to go away. A doctor might decide to remove a wart if it's painful or interferes with activities because of the discomfort.

Doctors have different ways of removing warts, including:

• using over-the-counter or prescription medications to put on the wart
• burning the wart off using a light electrical current)
• freezing the wart with liquid nitrogen (called cryosurgery)
• using laser treatment (with recalcitrant warts)

Within a few days after the doctor's treatment, the wart may fall off, but several treatments might be necessary. Doctors don't usually cut off a wart because it can cause scarring and the wart may return.

If an older child has a simple wart on the finger, ask the doctor about using an over-the-counter wart remedy that can help remove the wart. This treatment can take several weeks or months before you see results, but eventually the wart should crumble away from the healthy skin. Wart medicines contain strong chemicals and should be used with care because they can also damage the areas of healthy skin. Talk with your doctor before using any over-the-counter wart medicine on the face or genitals.

Also make sure that your child:

• soaks the wart in warm water and removes dead skin on the surface of the wart with an emery board (that's never going to be used for nails) before applying the medicine. Be careful not to file into it.
• keeps the area of the wart covered while the medicine works
• knows not to rub, scratch, or pick at it to avoid spreading the virus to another part of the body or causing the wart to become infected

You might also have heard that you can use duct tape to remove a wart. Talk to your doctor about whether this type of home treatment is OK for your child.

When to Call the Doctor

Before you try to remove a wart with a store-bought remedy, call your doctor if:

• you have a young child or infant with a wart anywhere on the body
• your child (of any age) has a wart on the face, genitals, or rectum

Also call the doctor if a wart or surrounding skin is:

• painful
• red
• bleeding
• swollen
• oozing pus

Although they can be a nuisance, warts are common in childhood and unlikely to cause serious problems.

Reviewed by: Joel Klein, MD
Date reviewed: November 2010