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Home treatment for warts Find out when you can safely treat warts at home and when you need to see a dermatologist.
Wart anatomy Warts grow only in the epidermis, the upper skin layer. A typical wart has a raised, rough surface. (Some, like those on the face, may be smooth and flat.) The center of a wart may be flecked with dark dots; these are capillaries that supply it with blood.
Among the 150 strains of HPV, about 10 cause cutaneous (skin) warts, including common, plantar, and flat warts (see "Common types of skin warts," below). Certain other strains cause anal warts and genital warts. Some sexually transmitted types of HPV are implicated in cervical and other genital cancers, but the strains that cause skin warts have rarely been linked to cancer.
Children and people with immune system abnormalities are particularly vulnerable. For reasons that aren't entirely clear, so are people in certain occupations, such as meat, fish, and poultry handlers. But the most likely explanation is that some people are simply more prone to warts than others. Skin warts aren't highly contagious.
Theoretically, you can also pick up warts from surfaces such as locker room floors or showers, but there's no way to know how often this occurs. Warts on one part of the body can be spread to other areas, so it's important to wash your hands and anything that touches your warts, such as nail files or pumice stones.
The ways of warts are much less predictable. According to dermatologist Dr. Suzanne Olbricht, "The wart virus resides in the upper layer of the skin, and who knows where or when you picked it up? The virus could have been there for years. Then it makes a wart for reasons we don't understand.
Found mostly on the hands, but may appear anywhere. Those under or around the fingernails and toenails can be hard to treat. Plantar Rough, spongy surface kept flat by walking; gray or brown with dark specks. Found only on the soles of the feet. Clustered plantar warts are called mosaic warts.
Smaller than other warts. Found mostly on the face, hands, and shins. They're less common than other warts, but when they do appear, it's often in large numbers. Studies indicate that about half of warts go away on their own within a year, and two-thirds within two years, so "watchful waiting" is definitely an option for new warts.
If you prefer not to wait it out, you have several treatment options: This is the main ingredient in aspirin, and it should usually be your first choice. According to one study, salicylic acid is the only topical treatment (treatment applied directly to the skin) that clearly outperforms a placebo.
Concentrations range from 17% to 40% (stronger concentrations should be used only for warts on thicker skin). To treat a wart, soak it for 10 to 15 minutes (you can do this in the shower or bath), file away the dead warty skin with an emery board or pumice stone, and apply the salicylic acid.
Warts in thick skin, like the bottom of the foot, may respond best to a patch that stays in place for several days. Continuing treatment for a week or two after the wart goes away may help prevent recurrence. In this treatment, also called cryotherapy, a clinician swabs or sprays liquid nitrogen onto the wart and a small surrounding area.
Getting rid of the wart this way usually takes three or four treatments, one every two to three weeks; any more than that probably won't help. After the skin has healed, apply salicylic acid to encourage more skin to peel off. Some individual trials have found salicylic acid and cryotherapy to be equally effective, with cure rates of 50% to 70%, but there is some evidence that cryotherapy is particularly effective for hand warts.
In one study comparing duct tape with cryotherapy, subjects wore duct tape patches over their warts for six days. Then they removed the patches, soaked and filed the warts, left them uncovered overnight, and reapplied the tape in the morning, leaving them in place for another six days. They followed this regimen for two months or until the wart disappeared.
Two other studies found no benefit, but those studies used clear duct tape rather than the standard silver type, which is stickier and has a different kind of adhesive. Given this limited evidence, if you plan to try duct tape, it makes sense to use the silver kind. Why duct tape works isn't clear — it may deprive the wart of oxygen, or perhaps dead skin and viral particles are removed along with the tape.
Warts that don't respond to standard therapies may be treated with prescription drugs. The topical immunotherapy drug imiquimod (Aldara), a standard therapy for genital warts, can also be used to treat skin warts. Imiquimod is thought to work by causing an allergic response and irritation at the site of the wart.
Other agents that may be used to treat recalcitrant warts are the chemotherapy drugs fluorouracil (5-FU), applied as a cream, and bleomycin, which is injected into the wart. All these treatments have side effects, and the evidence for their effectiveness is limited. The technical name for this treatment is electrodesiccation (or cautery) and curettage.
This usually causes scarring (so does removing the wart with a scalpel, another option). It's usually reserved for warts that don't respond to other treatments and should generally be avoided on the soles of the feet. Some skin cancers resemble warts at first. If you have a wart that doesn't change much in size, color, or shape, you probably don't need to see a clinician.
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