This is used on the skin to treat common skin and foot (plantar) warts. Salicylic acid helps cause the wart to gradually peel off. This medication is also used to help remove corns and calluses. This product should not be used on the face or on moles, birthmarks with hair growing from them, or genital/anal warts. Salicylic acid is a keratolytic. It belongs to the amount of moisture in the skin and dissolving the substance that causes the skin cells to stick together. This makes it easier to shed the skin cells.