Finger tendon pain and inability to straighten may be caused by tendon rupture, tenosynovitis, rheumatoid arthritis, etc. Symptoms can be relieved by tendon suture and medication such as ibuprofen. 1. Tendon rupture: Strenuous exercise or accidental injury may lead to tendon rupture, resulting in severe pain, inability to move the muscles normally, and inability to straighten the fingers. Tendon rupture can be treated through tendon repair surgery by suturing the ruptured tendon or immobilizing it in a plaster cast. 2. Tenosynovitis: Chronic strain caused by prolonged and frequent activities of the fingers will lead to tenosynovitis, which will result in limited movement of the fingers, joint pain and other symptoms. The symptoms can be relieved by anti-inflammatory and analgesic medications such as ibuprofen, as well as surgical release of the tendon sheath. 3. Rheumatoid arthritis: under the condition of streptococcal infection, induced by cold, damp and other factors can cause rheumatoid arthritis, patients appear joints such as finger pain, redness and swelling. Sensitive antibiotics such as the use of penicillin and other drugs can be selected for antibacterial treatment to relieve symptoms. Patients need to go to the hospital for relevant examinations to diagnose and come up with a treatment plan, such as the need to use drugs, please use under the guidance of a professional physician. Patients also need to pay attention to the posture of the usual exercise to avoid recurrence and so on.