There are two main types of arthritis. Rheumatoid arthritis is joint pain and damage caused by inflammation when the body’s immune system attacks joints. Osteoarthritis is joint wear and tear cause by aging or injury. Arthritis pain and stiffness can be treated with medications and nutritional supplements like glucosamine and chondroitin. Options for arthritis relief may include physical therapy and, in some joints, joint replacement surgery. Gout is painful arthritis caused by uric acid crystals deposited in the joints.