What is Rheumatoid Arthritis?
Rheumatoid arthritis (RA) is an autoimmune disease. It causes pain, swelling, stiffness, and loss of function in the joints. RA usually affects the same joint on both sides of the body. It occurs mostly in the:
- Fingers
- Wrists
- Elbows
- Shoulders
- Jaw
- Hips
- Knees
- Toes