Swelling of finger joints may be caused by rheumatoid arthritis, but trauma, endocrine diseases, infections and other causes can also lead to this symptom. 1. Rheumatoid arthritis: rheumatoid arthritis may lead to finger joint swelling, joint pain, morning stiffness and other symptoms due to the disease invading the surrounding joints. 2. Trauma: If the patient’s finger joints have been traumatized by external force or violence, it may lead to fracture or soft tissue injury in the finger joints, resulting in swelling of the joints. 3. Endocrine diseases: endocrine diseases such as acromegaly, macrosomia and other endocrine diseases can lead to swollen finger joints due to endocrine dysfunction. 4. Infection: the soft tissues of the finger joints are infected by bacteria, fungi and other pathogens, which can also lead to joint swelling. There may be other reasons for the swelling of finger joints, and it is recommended to go to the Department of Rheumatology and Immunology of regular hospitals for further diagnosis.