Buy shoes when to buy the right don't buy too small, too small will often wear feet, time will have corns.
Frequently give the feet a foot massage, can also play a preventive role on the corns.
You can use the cool oil, every day, the cool oil coated in the corns a few times, and then lighted cigarettes to smoke, so that the cool oil dissolved into the corns, a few days later, the corns will automatically fall off.
Or use potassium permanganate on the corns, a day can be changed twice potassium permanganate
Use a small amount of leek, and then chopped, crushed some of the better, and then coated in the corns of the place is also a good method.