Arthritis is inflammation of the joints that causes pain and restricts movement. Arthritis is caused by the breakdown of cartilage that normally protects the joint and facilitates smooth movement. Without cartilage, bones rub together, which creates inflammation, pain, and stiffness. There are a variety of different types of arthritis, but some common causes are autoimmune disease, broken bones, age-related wear and tear, and infection.
- Joint swelling
- Reduced ability to move the joint
- Redness of the skin