Achy joints? It could be osteoarthritis. Osteoarthritis, the most common type of arthritis, is a condition caused by wear and tear on the cartilage of your joints. This strong tissue usually cushions joints, but can wear down over time, causing joints to ache, and become stiff and painful. There's no cure, but a variety of painkillers and treatments can help, as can losing weight if you have excess pounds.

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