👉 Rheumatoid arthritis is a chronic autoimmune disease that affects the joints, tendons, and other connective tissues in the body. It usually starts in children but can also affect adults. The symptoms of rheumatoid arthritis include pain, swelling, stiffness, and often joint destruction. Treatment varies depending on the severity and type of arthritis, with some medications and lifestyle changes such as reducing stress and maintaining a healthy diet being recommended.