What is Rheumatoid arthritis?

Rheumatoid arthritis is an autoimmune condition in which the immune system mistakenly attacks the lining of the joints, causing inflammation, pain, swelling, and stiffness. It most commonly affects the hands, wrists, and feet, often symmetrically on both sides of the body.

Unlike the wear-and-tear damage of osteoarthritis, rheumatoid arthritis is driven by inflammation and can also affect other parts of the body, including the eyes, lungs, and blood vessels, if not well controlled.