Verrucae are not usually treated in children. If there is a build up of callus then this may be trimmed off by a Podiatrist/Chiropodist to help alleviate the pain. The Verruca usually stays a few months in children and so should be left alone to let the body fight off the infection and hopefully achieve immunity to the virus. The idea being that if in time the person is later exposed to the virus, they may not pick up another Verruca.