Corns on the feet are caused by long-term extrusion or friction on the feet, and can be removed by medication (such as salicylic acid ointment), surgical treatment or physical therapy. 1. Medication: If the symptoms of corns are not serious, you can use ointment to apply such as salicylic acid ointment, urea ointment, etc., which can promote the shedding of old corns, and use warm water to soak your feet after application, which is easier to soften the corns. Be aware that there may be skin irritation symptoms, salicylic acid and urea allergy is prohibited. 2. Surgery: If the patient’s corns are more serious, the effect of drug methods is not obvious, you can carry out surgical methods to remove, can remove the corns as a whole, to avoid the recurrence of corns. 3. Physical therapy: This is the most commonly used method of removing corns, including laser, electrocautery, liquid nitrogen freezing, microwave cauterization and so on. When corns appear, it is recommended to go to the hospital in time, and use drugs or other ways of treatment under the guidance of the doctor.