Cocoon on the foot is a kind of stratum corneum hyperplasia formed after friction stimulation. Its main purpose is to protect the foot tissue from friction damage, and it is a compensatory physiological hyperplasia. If you want to get rid of this situation, it is recommended to wear loose, breathable and comfortable shoes to prevent the foot stratum corneum from rubbing. Choosing a place with long cocoons, externally applying corrosive salicylic acid ointment and compound lactic acid cream twice a day can effectively soften the cocoons on the whole foot. Usually, you need to be careful not to stimulate the thickened skin with files and nail clippers, otherwise it may lead to external irritating damage, and in severe cases, bacterial infection may be formed, leading to adverse complications.