The patient’s toes are bent and cannot be straightened for the following reasons: First, tenosynovitis of the toes: due to repeated friction between the toe tendon sheaths and tendons during frequent weight bearing and activities, inflammation of the tendon sheaths will occur, and as the inflammation of the tendon sheaths worsens, the tendon sheaths will become hyperplastic, which will cause the tendons to be stuck in the tendon sheaths, so the toes will pop, or the toes will suddenly be stuck and unable to move when they are active. Second, bunion: In bunion, the bunion will be deflected to the outside, and if the degree of bunion is heavy, it will jack up the 2nd-3rd toe, and over time, the supination deformity of the 2nd-3rd toe will appear, which will be manifested as rigid flexion and deformity of the 2nd-3rd toe, which cannot be straightened.