Medical Definition of Arthritis

Reviewed on 3/29/2021

Arthritis: Inflammation of a joint. When joints are inflamed they can develop stiffness, warmth, swelling, redness and pain. There are over 100 types of arthritis. (see osteoarthritis, rheumatoid arthritis, ankylosing spondylitis, psoriatic arthritis, lupus, gout, pseudogout).

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What Is Rheumatoid Arthritis (RA)? Symptoms, Treatment, Diagnosis See Slideshow

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