Rheumatology focuses on the diagnosis and treatment of rheumatism, arthritis, and other disorders and diseases of the joints, muscles, and ligaments. These musculoskeletal issues are typically autoimmune conditions, which occur when the immune system mistakenly causes inflammation to different parts of the body. Symptoms include joint pain, swelling and redness, and loss of motion in affected joints. Treatment may include medication and joint or tendon injections, physical therapy, diet changes and rest. Your rheumatologist will work with you to come up with a treatment plan that suits your needs.