Failure to bend the finger is usually treated with either conservative or surgical treatment to correct the cause of the failure to bend the finger and to allow the finger to move normally. There are many diseases that can cause a finger to become unbendable, and the finger can only move normally after the causative factor is completely removed. For example, a common cause of finger bending is stenosing tenosynovitis, which can be cured by closed treatment or surgery, allowing the finger to bend normally. In addition, the cause of the finger not being able to bend may also be a fracture or ligament rupture, after the cast fixation and the resulting finger stiffness, at this time only need to do strict systematic functional exercise, can make the finger function can be restored.