A hammer toe is a bent smaller toe, sometimes swollen and painful. There are two different types.Flexible Hammer Toes are less serious because they can be diagnosed and treated while still in the developmental stage. They are called flexible hammer toes because they are still moveable at the joint. Rigid Hammer Toes This variety is more developed and more serious than the flexible condition. Rigid hammer toes can be seen in patients with severe arthritis, for example, or in patients who wait too long to seek professional treatment. The tendons in a rigid hammer toe have become tight, and the joint misaligned and immobile.