The standard treatment for corns and calluses is salicylic acid, which is also used in wart treatment. This is a keratolytic, which means it dissolves the protein or keratin that makes up the corn and the dead skin around it. It is available in creams, pads, and plasters, or it can be applied using an applicator or a dropper. The top of the skin will turn white, and the dead tissue can be cut or filed away. Salicylic acid comes in different concentrations. Stronger doses may work faster, but it will need a prescription. The ingredients can irritate surrounding skin, so care should be taken when applying it. Do not use this on a cracked corn or callus.
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