Corns are usually found in people who stand or walk for long periods of time, and friction and pressure are important causes. There are many ways to remove it. The first one is to apply ointment to the corns; the second one is to apply ointment to the corns, which is fixed with adhesive tape around the corns to protect the dressing and then covered with adhesive tape, which is changed once a week until it falls off; the third one is to apply forty percent urea ointment; the fourth one is to apply Chinese medicine, which is to change the dressing once every six hours by pounding crow’s nest; the fifth one is to apply physical therapy, electrocautery, carbon dioxide laser cautery; the sixth one is to remove it surgically. After all therapeutic treatments patients should reduce local friction and pressure, such as not wearing hard shoes, thicker cotton padding inside shoes, and correcting foot deformities.