Unexplained muscle pain in the arms and legs may be the result of benign issues. Or it may point to a more serious underlying condition, such as fibromyalgia, infection, or thyroid issues.
ALS and other spinal muscular atrophies Diseases of the peripheral nerves Metabolic diseases of the muscle – muscular dystrophies Myopathies, myositis, myotonias, vasculitis The Shin J. Oh, Muscle and ...