The most common causes of<unk>  are overuse, injury, or strain. However,<unk>  can also be caused by diseases, medications, or as a response to a vaccination. Dehydration at times results in muscle pain as well, especially for people involved in extensive physical activities such as workout. It is also a sign of acute rejection after heart transplant surgery. The most common causes are: Overuse Overuse of a muscle is using it too much, too soon or too often. One example is repetitive strain injury. See also: * Exercise * Weight lifting Injury The most common causes of<unk>  by injury are: sprains and strains. Autoimmune * Multiple sclerosis (neurologic pain interpreted as muscular) *<unk>  Encephalomyelitis (chronic fatigue syndrome) * Myositis * Mixed connective tissue disease * Lupus erythematosus * Fibromyalgia syndrome * Familial Mediterranean fever * Polyarteritis nodosa * Devic's disease * Morphea * Sarcoidosis Metabolic defect * Carnitine palmitoyltransferase II deficiency * Conn's syndrome * Adrenal insufficiency * Hyperthyroidism * Hypothyroidism * Diabetes * Hypogonadism * Postorgasmic illness syndrome Other * Chronic fatigue syndrome * Channelopathy * Ehlers Danlos Syndrome * Stickler Syndrome * Hypokalemia * Hypotonia * Exercise intolerance * Mastocytosis * Peripheral neuropathy * Eosinophilia<unk>  syndrome * Barcoo Fever * Herpes * Hemochromatosis * Delayed onset muscle soreness * HIV/AIDS * Generalized anxiety disorder * Tumor-induced osteomalacia * Hypovitaminosis D * Infarction Withdrawal syndrome from certain drugs Sudden cessation of high-dose corticosteroids, opioids, barbiturates, benzodiazepines, caffeine, or alcohol can induce<unk> .
Myalgia
Allodynia
Pain
Tenderness 
Bone pain
Weather pains
Visceral pain
Muscle atrophy