Pain when bending the finger joints may be caused by tenosynovitis, rheumatoid arthritis, etc. The cause of the disease needs to be further clarified and medication and other treatments should be chosen according to the cause of the disease. 1. Tenosynovitis: Tenosynovitis is a chronic inflammation that occurs in the tendon sheaths, which can be caused by infection, trauma, strain, etc. Patients may have symptoms such as pressure pain, joint pain, and impaired mobility, etc. Non-steroidal anti-inflammatory drugs such as naproxen, ibuprofen, etc., need to be used for pain relieving and anti-inflammatory treatments, and then according to the causes of tendon sheath inflammation, anti-tuberculosis, anti-bacterial, anti-rheumatic and other medications should be selected for the treatments. 2. Rheumatoid arthritis: rheumatoid arthritis can cause patients to have limited joint movement, joint pain, joint swelling and other symptoms, you can choose etoricoxib, celecoxib and other non-steroidal anti-inflammatory drugs to alleviate the symptoms, and then through the methotrexate, adalimumab and other medications to carry out anti-rheumatic treatment, if necessary, need to carry out surgical treatment such as synovectomy. Drugs should be used under the guidance of a physician, and there may be other causes of pain when bending the finger joints, so patients are advised to go to orthopedics, rheumatology, immunology and other related departments in regular hospitals for further clarification of the cause of the disease and standardized treatment in accordance with the doctor’s instructions.