Rheumatoid arthritis (RA) is an autoimmune disease that causes chronic inflammation of the joints.
Osteoarthritis (OA) is the most common form of arthritis. It is caused by wear and tear on the joints.
Gout is a type of inflammatory arthritis that causes sudden and severe attacks of pain, redness, swelling, and tenderness in one or more joints.
Psoriatic arthritis is a type of inflammatory arthritis that affects some people with psoriasis, a skin condition.
Ankylosing spondylitis is a type of inflammatory arthritis that affects the spine and large joints.