Corns are mainly due to thickening of the stratum corneum caused by prolonged pressure or friction, and can be surgically removed or treated with topical medications. It occurs in adults and is more common in females. The lesions are clearly defined conical plugs with the tips embedded in the skin, which can be painful when standing or walking. Treatment can use corns cream, 50% salicylic acid ointment and other local topical application, but should protect the surrounding normal skin, or the use of laser, freezing and other physical methods, or surgical excision. To prevent corns from developing usually should try to avoid friction and extrusion, shoes should be adequate. When corns appear, you should go to the hospital under the guidance of professional doctors to choose the appropriate treatment to improve the quality of life, do not self-medication aggravate the condition.