Arthritis Arthritis Arthritis is a term often used to mean any disorder that affects joints. Symptoms generally include joint pain and stiffness. Other symptoms may include redness, warmth, swelling, and decreased range of motion of the affected joints. In some types other organs are also affected. Onset can be gradual or sudden. There are over 100 types of arthritis. The most common forms are osteoarthritis (degenerative joint disease) and rheumatoid arthritis. Osteoarthritis usually occurs with age and affects the fingers, knees, and hips. Rheumatoid arthritis is an autoimmune disorder that often affects the hands and feet. Other types include gout, lupus,
Septic arthritis maximal in this position. In peri-articular arthritis, pain only occurs when the joint is moved, and the lesion usually lies in one specific area around the joint. The most common joint affected is the knee. Hip, shoulder, wrist, and elbow joints are less commonly affected. Spine, sternoclavicular, and sacroiliac joints can also be involved. The most common cause of arthritis in these joints is intravenous drug use. Usually only one joint is affected. More than one joint can be involved if bacteria are spread through the bloodstream. For those with artificial joint implants, there is a chance of 0.86 to