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A hammer or claw toe deformity can affect any of the lesser toes. In a hammer toe deformity, the toe is bent at the middle joint, resembling a hammer. A hammer toe is the most common deformity of the lesser toe and results from an imbalance of the pull of the muscles which extend and flex your toes. In a claw toe deformity, the toe is curled up and bent at the interphalangeal joints into a claw position. Clawing of the lesser toes is usually associated with nerve injury or can be genetic. Like bunions, these deformities are initially flexible, but can progress and become fixed.