What Is Arthritis?
Arthritis refers to conditions that cause joint pain, stiffness, swelling, and reduced function.
Key Idea
Arthritis isn’t a single disease. It includes degenerative types (like osteoarthritis) and inflammatory types (like rheumatoid arthritis), among others.
What Happens in the Joint
Cartilage thins, synovial lining can inflame, fluid may increase, and bone spurs can form—leading to pain and limited motion.
Who Is Affected
All ages can be affected. Risk factors include prior joint injury, repetitive loading, obesity, autoimmune disease, genetics, and age.
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