What is it? Arthritis is a general term for a variety of conditions that cause inflammation and degeneration of the cartilage and lining of the joints of the body. Arthritis can occur at any joint and is common in the feet and ankles. Arthritis is often considered a disease of the aging but can occur at any age. There are many different kinds of arthritis. Some of the most common types are osteoarthritis and rheumatoid arthritis. What causes it? Osteoarthritis is typically co