Arthritis is a condition characterized by pain, stiffness, swelling, tenderness, and decreased range of motion in the joints. Symptoms can be transient or chronic, ranging in intensity from mild to severe. Symptoms may stay the same for long periods of time or get worse as time goes on. Severe arthritis can cause chronic pain and make the sufferer incapable of doing day-to-day activities. Arthritis can even cause physical changes in the joints (e.g., knobbiness in finger joints).
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