Swollen and painful finger joints may be caused by gout, rheumatoid arthritis, tenosynovitis and other reasons. 1. Gout: the occurrence of gout is related to uric acid metabolism disorder, patients often appear joint redness, swelling, fever, severe joint pain and joint mobility disorders and other symptoms. 2. Rheumatoid arthritis: Rheumatoid arthritis mainly involves the joints around the patient and leads to morning stiffness in the affected joints, joint swelling and joint pain, etc. When it involves the finger joints, it may lead to finger joint swelling and pain. 3. Tendovaginitis: Tendovaginitis is caused by chronic strain injury, resulting in joint swelling and impaired mobility due to inflammation of tendons and tendon sheaths. Swollen and painful finger joints can also be caused by other reasons, we suggest that patients with swollen and painful finger joints go to orthopedics, rheumatology and immunology departments of regular hospitals for detailed consultation.