There are many reasons for finger stiffness, such as tenosynovitis, poor fracture healing, rheumatoid arthritis, etc. Common correction methods include finger exercises, surgery, medication, and wearing finger braces. 1. Tenosynovitis: If the fingers are not straight and stiff due to tenosynovitis or long time inactivity of the fingers after trauma, it can be corrected by doing finger exercises and related functional exercises. 2. Poor fracture healing: fingers not straight caused by deformed fracture healing, if you want to correct the deformation of the fingers, you can consider surgical treatment. 3. Rheumatoid arthritis: the ultimate change of rheumatoid arthritis is the deformation of the finger joints, resulting in reduced or loss of finger function, the purpose of taking medication is to slow down this process. You can follow the doctor’s instructions to take palliative anti-rheumatic drugs, such as methotrexate, leflunomide, etc., as well as biologics, such as etanercept and anti-inflammatory and analgesic drugs, such as etoricoxib and meloxicam. It is recommended to go to the orthopedic hospital for examination to clarify the cause of the disease and then take corresponding treatment measures.