Corns is a limited keratotic hyperplasia caused by long-term pressure and friction on the skin, which can be painful after squeezing. It is most commonly found on the more prominent stressed parts of the soles of the feet, such as the lateral or medial edge of the little toe, and is mostly seen in women who wear high heels for a long time. The main causes of the disease include prolonged walking, standing, excessive bone protrusion and shoes that are too tight and too hard. Plantar corns are often directly related to the shape, quality, size and material of the shoes chosen, and sometimes also related to the way the patient wears shoes and walking characteristics. If the patient wears unsuitable shoes for a long time, women wear high heels for a long time, standing or walking for a long time, foot deformity and wearing shoes without socks can increase the pressure and friction on the foot, which can easily lead to corns over a longer period of time. Long-term labor, maintaining a certain action of friction, extrusion, pressure parts can also gradually form corns. The plantar corns can be treated with drugs, such as topical corns cream, salicylic acid ointment, etc. According to the instructions, the ointment is applied to the corns and the surrounding skin tissue is protected, usually after several changes of medication, the local corns can gradually be eroded, and eventually the corns can be removed. In addition, the more serious cases can also choose physical therapy or surgical treatment. It is important to choose appropriate footwear to keep the feet clean and dry. Reducing local friction and pressure can relieve the condition and prevent corns from forming again.