Arthritis is inflammation of one or more of your joints. The most common types are osteoarthritis and rheumatoid arthritis. Osteoarthritis affects structures throughout the joint. The cartilage, the slippery tissue that covers the ends of bones in a joint, begins to break down and wear away. This allows bones to rub together, eventually causing inflammation and pain. READ MORE ABOUT OSTEOARTHRITIS.

Rheumatoid arthritis (RA) is an autoimmune disease that occurs when the body's immune system attacks and damages the joints and, sometimes, other organs. READ MORE ABOUT RHEUMATOID ARTHRITIS.