Arthritis is defined as inflammation of bones and joints. It makes movement hard and painful as the joints swell and interfere with flexibility.
Rheumatoid arthritis and psoriatic arthritis, which is associated with the skin disease psoriasis, are two types of the condition that many people have heard about. Here are three others:
- Peripheral arthritis: Affects joints in the arms and legs, such as elbows, wrists, knees, and ankles. This causes no lasting damage to the joints.
- Axial arthritis: Mainly affects the lower back but can include the ribs. Occasionally causes minor damage to joints.
- Ankylosing spondylitis: A more serious form of arthritis that inflicts permanent damage to the spine, eyes, lungs, and heart valves.