slide 1 of 3, Hammer toe,
A hammer toe bends down at the middle toe joint (proximal interphalangeal joint, or PIP joint). The toe may bend up at the joint where the foot and toe meet (metatarsophalangeal joint, or MTP joint) causing the middle toe joint to be raised slightly.
There may also be a deformity at the joint near the tip of the toe (distal interphalangeal joint, or DIP joint).