D2I2.
common

Hammer toe

A hammer toe, hammertoe or contracted toe is a deformity of the muscles and ligaments of the interphalangeal joint of the second, third, fourth, or fifth toe, bending it into a shape resembling a hammer. In the early stage, a flexible hammertoe is movable at the joints; a rigid hammertoe joint cannot be moved and usually requires .

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Plain-language summary adapted from Wikipedia. Not medical advice.