Although it can occur in almost any joint, osteoarthritis is a condition that often occurs most commonly in the knee.
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In osteoarthritis the protective cartilage in the joints wears down over time. It’s more common in people over 50 and people who are overweight, but cartilage can wear away in virtually anyone.
Simply walking her dog used to be torture for 51-year-old Terri LaRoche. She has a common problem, arthritis in both knees.