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AC Joint Arthritis: Causes, Symptoms, Treatment, and Outlook

AC Joint Arthritis: Causes, Symptoms, Treatment, and Outlook

Arthritis in the AC joint is a most common cause of shoulder pain in adults. Arthritis here usually develops when the smooth cartilage between your scapula and collar bone wears down, becoming thin and rough. This can cause pain and inflammation in the joint when the end of your bones rub against each other.

Source: Healthline