Finger joints that are bent and not straight are considered to be related to tenosynovitis, tendon injuries, osteoarthritis and other causes. According to the cause of the disease, general treatment, physical therapy, drugs, surgery and other methods of treatment. 1. Tendovaginitis: It is due to the frequent extension and flexion activities of the fingers, causing aseptic inflammation of the tendons and tendon sheaths, and the joints will not bend straight. Usually pay attention to rest, you can use hot compresses physiotherapy and other treatment. You can also apply non-steroidal anti-inflammatory drugs, such as diclofenac sodium and other treatment. If the symptoms are serious, conservative treatment is ineffective can be surgical treatment, such as open tendon sheath release surgery. 2. Tendon injury: after the finger injury, if the extensor tendon injury or even extensor tendon rupture, it will also cause the joint bending and not straight. After the injury, pay attention to rest, mild injury can be immobilized by splint or plaster. If tendon rupture occurs, surgical repair is feasible. After the operation, actively carry out rehabilitation exercises, which is conducive to functional recovery. 3. Osteoarthritis: including osteoarthritis, rheumatoid arthritis and gouty arthritis, etc., the patient will have swollen and deformed joints, stiffness, and also limited delivery, which will also cause the joints to bend and not straight. Usually pay attention to rest, pay attention to keep warm. Can apply non-steroidal anti-inflammatory drugs, such as celecoxib and other treatment. Can also be combined with heat therapy, baking electricity and other treatments. If the condition is serious and conservative treatment is ineffective, artificial joint replacement is feasible. When the finger joints are bent and not straight, you can go to the hospital to further identify the cause of the disease, and then targeted treatment. The above drugs need to be applied under the guidance of a physician, avoid self-medication.