There are several possible causes of swollen and painful finger joints: first, gout, when gout involves the finger joints, there can be swollen and painful finger joints, which can be accompanied by redness and swelling of the skin and increased skin temperature, and in serious cases, the formation of gout stones. Second, rheumatism and rheumatoid, when rheumatism and rheumatoid involve the finger joints, there can be swelling and pain in the finger joints, and there can be serious joint deformity, then blood tests and hand X-ray examination should be performed for diagnosis; third, osteoarthritis of the finger joints, patients with osteoarthritis can have swelling and pain in the finger joints, which can be accompanied by the formation of bone redundancy, then X-ray examination of the fingers should be performed for early diagnosis and early treatment.