How do dermatologists diagnose and treat warts?

Updated: Sep 10, 2020



Warts are caused by the human papilloma virus (HPV). A dermatologist can tell whether you have a wart by looking at it. In rare cases, a dermatologist may need to perform a skin biopsy to be certain. If a dermatologist needs to perform a biopsy, the doctor will remove the wart and send it to a lab. At the lab, a small piece of the wart will be looked at under a microscope. A biopsy is a safe and quick procedure for a dermatologist to perform. It should not cause any anxiety.






Treatment:

Warts often go away without treatment in case of children. In adults, warts may not disappear as easily or as quickly as they do in children. Although most warts are harmless, dermatologists do treat them.

You should see a dermatologist if you cannot get rid of the warts, the warts hurt, or you have many warts. Dermatologists have many treatments for warts. The treatment used depends on the patient’s age and health as well as the type of wart.

A dermatologist may use one of the following treatments:

  • Cantharidin: A dermatologist may treat a wart in the office by "painting" it with cantharidin. Cantharidin causes a blister to form under the wart. In a week or so, you can return to the office and the dermatologist will clip away the dead wart.

  • Cryotherapy: For common warts in adults and older children, cryotherapy (freezing) is the most common treatment. This treatment is not too painful. It can cause dark spots in people who have dark skin. It is common to need repeat treatments.

  • Electrosurgery and curettage: Electrosurgery (burning) is a good treatment for common warts, filiform warts, and foot warts. Curettage involves scraping off (curetting) the wart with a sharp knife or small, spoon-shaped tool. These two procedures often are used together. The dermatologist may remove the wart by scraping it off before or after electrosurgery.

  • Excision: The doctor may cut out the wart (excision).

If the warts are hard-to-treat, the dermatologist may use one of the following treatments:

  • Laser treatment: Laser treatment is an option, mainly for warts that have not responded to other therapies. Before laser treatment, the dermatologist may numb the wart with an anesthetic injection (shot).

  • Chemical peels: When flat warts appear, there are usually many warts. Because so many warts appear, dermatologists often prescribe "peeling" methods to treat these warts. This means, you will apply a peeling medicine at home every day. Peeling medicines include salicylic acid (stronger than you can buy at the store), tretinoin, and glycolic acid.

  • Bleomycin: The dermatologist may inject each wart with an anti-cancer medicine, bleomycin. The shots may hurt. They can have other side effects, such as nail loss if given in the fingers.

  • Immunotherapy: This treatment uses the patient’s own immune system to fight the warts. This treatment is used when the warts remain despite other treatments. One type of immunotherapy involves applying a chemical, such as diphencyprone (DCP), to the warts. A mild allergic reaction occurs around the treated warts. This reaction may cause the warts to go away. Another type of immunotherapy involves getting shots of interferon. The shots can boost the body’s immune system, which gives the body the ability to fight the virus.

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