Finger deformity is common in rheumatoid arthritis and rheumatoid arthritis, long-term chronic strain, gouty arthritis, and deformed healing after fracture. 1. Rheumatoid arthritis and rheumatoid arthritis: this is a common cause of joint deformity in clinic, which will lead to deformity of finger joints in the later stage. 2. Long-term chronic strain: mostly due to more stress on the hand, the joints of the hand appear deformed under long-term stress. 3. Gouty arthritis: most of them are seen in the late stage of gout, due to the formation of gout stones, which are attached to the finger joints, resulting in deformity of the finger joints. 4. Fracture deformity healing: finger fracture without formal treatment, resulting in deformity healing triggered finger deformity. There are many other causes of finger deformity, you should go to the hospital in time, and improve the relevant examination, clear the cause of the disease, and then follow the doctor’s instructions for targeted treatment.