Muscle aches may be symptoms of flu, lupus, fibromyalgia, dermatomyositis, rheumatoid arthritis, lyme disease, thyroid disorder, poliomyelitis, chronic fatigue syndrome, diabetes, tetanus, rickettsial diseases, polymyalgia rheumatica, polymyositis, trichinosis and muscle cramps. To learn more about the cause of your symptoms, click on each of the diseases listed below.
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