Inability to bend the ring finger should be treated in different ways according to different causes. Common causes include tenosynovitis, joint destruction, and nerve damage to the fingers, etc. Treatment includes physical therapy, medication, rehabilitation exercises, and surgery. 1. Tenosynovitis: In tenosynovitis, the tendon in the tendon sheath is edematous and thickened, and there is a possibility of jamming problem, resulting in the inability to bend and straighten the finger normally. It can be treated with physiotherapy, closure and surgical treatment. 2. Joint destruction: Diseases such as arthritis, rheumatoid, gout, etc. can lead to joint destruction, which in turn leads to joint stiffness, making it impossible to bend the fingers. Medications such as non-steroidal drugs celecoxib and ibuprofen can be used, and surgery can be used if the condition is serious. 3. Damage to the nerves of the fingers: Damage to the nerves that innervate the movement of the ring finger can lead to the inability to bend the fingers, which can be relieved by physical therapy, rehabilitation exercises, etc., and if the condition is serious, surgery is needed. Failure to bend the finger may also be caused by other reasons, once the finger can not be bent should go to the regular hospital in time to find out the cause and targeted treatment. The above physical therapy, rehabilitation and medication should be carried out under the guidance of a doctor.