A hammertoe is a term used to describe a crooked, deviated, or contracted toe. Although the condition usually stems from muscle imbalance, it is often aggravated by poor-fitting shoes or socks that cramp the toes. Over a period of years, the tendons that move the toe up and down begin to pull the toe with unequal tension, and the toe then begins to buckle or become contracted. Normally hammertoes by themselves are not painful, but with foot wear the prominent knuckle of the toe rubs the shoe, producing an area of irritation which eventually forms a corn.

Hammertoes can be treated with protective pads, orthotic devices, specially fitted shoes, medication and also surgically.