A hard corn is a small circular area of thickened, dead skin with a central core. A soft corn has a thinner surface and usually occurs between the last two smaller toes. A seed corn is a tiny callus near to the skin surface that can be very tender if it's on a weight-bearing part of the foot. Seed corns tend to occur on the bottom of the feet on dryer skin. To avoid corns, ensure toes are free to move in shoes whilst still being supported. If corns occur between the toes, consider a gel toe support to reduce the friction. If corns occur on the base of the foot, moisturise daily and use cushioning supports.