myalgia myalgia myalgia (also called muscle pain and muscle ache in layman's terms) is the medical term for muscle pain. myalgia is a symptom of many diseases. the most common cause of acute myalgia is the overuse of a muscle or group of muscles; another likely cause is viral infection, especially when there has been no trauma. myalgiaother namesmuscle pain, muscle acheone of the myalgic simptomsspecialtyrheumatology long-lasting myalgia can be caused by metabolic myopathy, some nutritional deficiencies, and chronic fatigue syndrome. causes the most common causes of myalgia are overuse, injury, and strain. myalgia might also be caused by allergies, 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. muscle pain is also a common symptom in a variety of diseases, including infectious diseases, such as influenza, muscle abscesses, lyme disease, malaria, trichinosis or poliomyelitis; autoimmune diseases, such as celiac disease, systemic lupus erythematosus, sjögren's syndrome or polymyositis; gastrointestinal diseases, such as non-celiac gluten sensitivity (which can also occur without digestive symptoms) and inflammatory bowel disease (including crohn's disease and ulcerative colitis). the most common causes are: injury or trauma, including sprains, hematoma overuse: using a muscle too much, too often, including protecting a separate injury chronic tension muscle pain occurs with: rhabdomyolysis, associated with: viral compression injury leading to crush syndrome drug-related commonly fibrates and statins occasionally ace inhibitors, cocaine, and some retro-viral drugs severe potassium deficiency fibromyalgia ehlers-danlos syndrome auto-immune disorders, including: mixed connective tissue disease systemic lupus erythematosus polymyalgia rheumatica polymyositis dermatomyositis multiple sclerosis (this is neurologic pain localised to myotome) infections, including: influenza (the flu) lyme disease babesiosis malaria toxoplasmosis dengue fever hemorrhagic fever muscular abscess compartment syndrome polio rocky mountain spotted fever trichinosis (roundworm) ebola covid-19 other postorgasmic illness syndrome (pois) overuse overuse of a muscle is using it too much, too soon or too often. one example is repetitive strain injury.