The jamming of the middle finger of the right hand when it is bent and then straightened can be considered to be related to stenosing tenosynovitis, gout, joint damage and other causes. 1. Stenosing tenosynovitis: Repeated straining and exposure to cold cause hyperplasia of the flexor tendons and tendon sheaths, resulting in jamming on the tendon sheaths when the fingers move. Hand pain, finger extension and flexion dysfunction, and a feeling of jamming when flexing and extending occur. In severe cases, it even leads to the inability of finger flexion and extension, and can only be fixed in the straight or flexed position. 2. Gout: When gouty arthritis attacks, due to the gout stones inside the interphalangeal joints, resulting in jamming symptoms when the fingers are flexed. 3. Joint damage: For example, when there is fracture or ligament damage around the interphalangeal joints of the fingers, the finger joints can become stuck during movement. In this case, the finger is stuck in a certain position and cannot be moved, and its previous position can be restored by appropriate traction. Localized physical therapy can be used to relieve the symptoms. At the same time, it is important to limit finger movement so as not to aggravate the condition.