How does the middle finger joint swell?

Swelling of the middle finger joint may be caused by trauma, infection, autoimmune disease, metabolic disease, osteoarthritis, or other causes. Depending on the information you provide, your needs are to understand the cause of swelling of the middle finger joint. Here are the relevant answers: 1. It may be caused by trauma. Sprain, contusion, or fracture may cause swelling of the middle finger joint. 2. It may be caused by infection. If the middle finger joint is infected by bacteria or viruses, it may cause inflammation, resulting in swelling, pain and other symptoms. 3. It may be caused by autoimmune diseases. For example, rheumatoid arthritis, systemic lupus erythematosus, etc., may attack the middle finger joint, resulting in swelling, pain, stiffness and other symptoms. 4. It may be caused by metabolic diseases. For example, gout, pseudogout, etc., may form urate crystals at the middle finger joints, leading to inflammation and swelling. 5. May be caused by osteoarthritis. With age, finger joints may undergo degenerative changes, leading to osteoarthritis, causing swelling, pain, stiffness and other symptoms of the middle finger joints. 6. May be caused by other reasons. For example, tenosynovitis, bursitis, finger tumors, etc., may also lead to swelling of the middle finger joint. It should be noted that the above are just some of the possible causes, and the specific reasons need to be examined and evaluated in detail according to the specific conditions of the patient. If swelling of the middle finger joint occurs, it is recommended to seek medical attention in time to make a clear diagnosis and take appropriate treatment measures.