The causes of middle finger joint bending pain include tenosynovitis, rheumatoid arthritis, osteoarthritis, gouty arthritis, etc. Depending on the causes, you can choose medication, physical therapy, surgery and so on. 1. Tendovaginitis: chronic aseptic inflammation of the fingers, mostly due to long-term inflammation stimulation around the joints, causing pain in the joints, and accompanied by impaired mobility. Treatment can be oral non-steroidal anti-inflammatory drugs under the guidance of the doctor, such as celecoxib, diclofenac sodium, etc., can also be localized closed treatment. If the treatment effect is poor, surgery can be considered. 2. Rheumatoid arthritis: it is a kind of autoimmune disease, mostly involving the small joints of both hands, and the patients mostly have pain in the middle finger joints, morning stiffness, which can lead to joint deformity in severe cases. Treatment can be oral non-steroidal anti-inflammatory drugs, or oral anti-rheumatic drugs such as methotrexate, leflunomide and so on. 3. Osteoarthritis: It occurs mostly in middle-aged and old people, and usually strikes after getting cold and exertion. Mainly due to the joint cartilage caused by cartilage damage and degeneration, can be manifested as middle finger joint bending pain, activity symptoms aggravated. Treatment can be oral nutrition of articular cartilage drugs such as glucosamine. 4. Gouty arthritis: it is due to purine metabolism disorder, so that there is urate deposition in the joints and cause local inflammation, there can be bending pain in the middle finger joints. Treatment can be oral colchicine or celecoxib and other oral medications, but also oral uric acid drugs such as febuxostat. Similar symptoms are recommended to seek medical advice, identify the cause of the disease under the guidance of the doctor standardized treatment, avoid self-medication.