Corns are usually found in young women, mostly in the middle of the forefoot, the outer side of the little toe or the inner edge of the bunion, but also in the back of the toe and the heel, and occasionally in the hand, usually due to long-term friction and extrusion, causing conical keratinous hyperplastic skin damage. Usually, the middle forefoot, lateral little toe or medial bunion edge is irritated by friction with shoes and socks while walking, which can easily produce corns. The corns are generally the size of a soybean or larger, with a smooth surface that is flat or slightly elevated, yellowish or dark yellow, translucent, with a wedge-shaped tip, and embedded in the dermis to stimulate peripheral nerves and produce pain. Patients are advised to wear comfortable, soft shoes, minimize friction and extrusion, and avoid prolonged standing. If the shoes are more serious friction with the foot, they should be replaced in time to avoid aggravating the pain or producing new corns. Patients can go to the hospital in a timely manner and apply medication such as corns under the guidance of a doctor; more serious corns can be treated with laser cautery or liquid nitrogen freezing; larger corns need to perform corns excavation to cure completely.