Wart
There are some over the counter drugs, that usually contain an acid, very often salicylic acid. Getting rid of a wart that way involves cleaning the area around the wart, and treating it with the acid. This will slowly kill wart tissue. Dead tissue can then be removed. Getting rid of a wart that way usually takes several weeks. There are different drugs, with different acids. Some prescription drugs may contain stronger acids, such as chloroacetic acid or silver nitrate. All acids are caustic. This means, healthy tissue around the wart needs to be protected, before the substance is applied.