Corns are caused by repeated pressure and friction on the skin of the foot, resulting in a thickening of the local keratin layer, so corns can be treated with topical exfoliating agents, salicylic acid is a commonly used drug, or you can apply vitamin A acid ointment and corns patches. However, it is best to apply them under the guidance of a doctor, otherwise they may cause damage to the normal surrounding skin tissue. In addition to applying topical medications to treat corns, physical treatments such as laser and freezing are also available, as well as direct surgical excision to treat corns. For patients with relatively mild corns, they can slowly relieve themselves by simply switching to comfortable and breathable sports shoes.