Finger swelling and stiffness may be caused by rheumatoid arthritis, trauma, osteoarthritis and other reasons. 1. Rheumatoid arthritis: rheumatoid arthritis mainly invades the peripheral joints of the patient, and when the disease involves the finger joints of the patient, it can lead to morning stiffness, joint swelling, joint pain and other symptoms. 2. Trauma: Patients with a history of trauma such as bone fracture, joint dislocation, soft tissue injury, etc. may suffer from localized joint damage, resulting in joint swelling and stiffness. 3. Osteoarthritis: the specific etiology of osteoarthritis is not yet clear, may be related to biological, mechanical and other causes, mainly caused by the patient’s joint pressure pain, stiffness, swelling and other symptoms. There may be other reasons for the swelling and stiffness of the fingers, so it is recommended that patients go to a regular hospital to find out the cause of the swelling and stiffness of the fingers, and follow the doctor’s instructions for treatment.