Warts on the big toe
A wart (also known as verruca) is generally a small, rough tumor, typically on hands and feet but often other locations, that can resemble a cauliflower or a solid blister. Warts are common, and are caused by a viral infection, specifically by the human papillomavirus (HPV) and are contagious when in contact with the skin of an infected person. It is also possible to get warts from using towels or other objects used by an infected person. They typically disappear after a few months but can last for years and can recur.
Warts are caused by a virus called human papilloma virus or HPV. There are approximately 130 strains of human papilloma viruses. Types 1, 2, and 3 cause most of the common warts.
A range of different types of wart have been identified, varying in shape and site affected, as well as the type of human papillomavirus involved. These include
There are many different treatments and procedures associated with wart removal. One review of 52 clinical trials of various cutaneous wart treatments concluded that topical treatments containing salicylic acid were the best supported, with an average cure rate of 75%, compared with 48% for the placebo in six placebo-controlled trials including a total of 376 participants. The reviewers also concluded that there was little evidence of a significant benefit of cryotherapy over salicylic acid or duct tape.
One complicating factor in the treatment of warts is that the wart may regrow after it has been removed.