Rheumatoid arthritis (RA) is a chronic condition where your overactive immune system causes inflammation that attacks your joints. Common rheumatoid arthritis symptoms can include joint pain, joint swelling and stiffness, and fatigue. Other RA symptoms can include warm joints, joint deformity, and joint tenderness.
RA is an autoimmune disease, and the most common type of autoimmune arthritis. Around 1.5 million people in the US have RA, and nearly 3 times as many women have the disease as men. In women, RA can commonly begin between ages 30 and 60, but with men, it often occurs later.