Arthritis means irritation of the joints. It refers to a chronic sickness process. There are various forms of arthritis. The most common among them are osteoarthritis and rheumatoid arthritis. A degenerative joint disease that is usually common in the older age-group is termed as osteoarthritis. Rheumatoid arthritis refers to a severe disease that not only affects the joints of the fingers, wrists, hips, knees and feet, but also harms the muscles, tendons and body tissues.
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