View source for Myalgia

{{Infobox_Disease |
  Name           = Myalgia |
  Image          = |
  Caption        = |
  DiseasesDB     = 22895 |
  ICD10          = {{ICD10|M|79|1|m|70}} |
  ICD9           = {{ICD9|729.1}} |
  ICDO           = |
  OMIM           = |
  MedlinePlus    = |
  eMedicineSubj  = |
  eMedicineTopic = |
  MeshID         = |
}}
'''Myalgia''' means "[[muscle]] [[pain]]" and is a symptom of many diseases and disorders. The most common causes are the overuse or over-stretching of a muscle or group of muscles. Myalgia without a traumatic history is often due to [[virus|viral infection]]s. Longer-term myalgias may be indicative of a [[metabolic myopathy]], some nutritional deficiencies or [[chronic fatigue syndrome]].

==Causes==
The most common causes of myalgia are overuse, [[injury]] or [[Stress (medicine)|stress]]. However, myalgia can also be caused by diseases, disorders, medications, as a response to [[vaccination]] It is also a sign of acute rejection after heart transplant surgery.

The most common causes are: 
* Injury or trauma including sprains and strains 
* Overuse: using a muscle too much, too soon, too often 
* Tension or stress 

Muscle pain may also be due to:
* Certain drugs, including: 
** ACE inhibitors for lowering blood pressure 
** Cocaine 
** Statins for lowering cholesterol 
* Dermatomyositis 
* Electrolyte imbalances like too little potassium or calcium 
* [[Fibromyalgia]]
* Infections, including: 
** Influenza (the flu) 
** Lyme disease 
** Malaria 
** Dengue Fever 
** Muscle abscess 
** Polio 
** Rocky Mountain spotted fever 
** Trichinosis (roundworm) 
* Lupus 
* Polymyalgia rheumatica 
* Polymyositis 
* Rhabdomyolysis 

===Overuse===
Overuse of a muscle is using it too much, too soon and/or too often.<ref name=MedlinePlus> [http://www.nlm.nih.gov/medlineplus/ency/article/003178.htm MedlinePlus]</ref>  Examples are:
*[[Repetitive strain injury]].

===Injury===
The most common causes of myalgia by [[injury]] are: [[sprains]] and [[strain (injury)]].<ref name=MedlinePlus/>

===Autoimmune===
[[Multiple sclerosis]], Myalgic Encephalomyelitis, [[Myositis]], [[Lupus erythematosus]], [[Familial Mediterranean fever]], [[Polyarteritis nodosa]], [[Devic's disease]], [[Morphea]]

===Metabolic defect===
[[Carnitine palmitoyltransferase II deficiency]], [[Conn's syndrome]], [[Adrenal insufficiency]], [[Hyperthyroidism]]

===Other===
[[Chronic fatigue syndrome]], [[Ehlers Danlos Syndrome]], [[Hypokalemia]], [[Exercise intolerance]], [[Mastocytosis]], [[Peripheral neuropathy]], [[Eosinophilia myalgia syndrome]], [[Fibromyalgia]], [[Barcoo Fever]], [[Herpes]], [[Delayed onset muscle soreness]], [[AIDS]], [[HIV]], [[Tumor-induced osteomalacia]], [[Post Orgasmic Illness Syndrome]]

===Medications===
[[Acrylamide]], [[colesevelam]], [[darbepoetin]], [[darunavir]], [[ezetimibe]], [[ibandronate sodium]], [[imiquimod]], [[interferon]]s, [[isotretinoin]], [[procainamide]], [[quinupristin/dalfopristin]], [[statins]], [[sumatriptan]], [[tasigna]], [[tiotropium]], [[vardenafil]], [[zolmitriptan]], [[zocor]].

===Withdrawal syndromes===
Sudden cessation of [[opioids]], [[barbiturates]], [[benzodiazepines]], or [[alcohol]] can induce myalgia.

==See also==
* [[Delayed onset muscle soreness]]
* [[Myopathy]]
* [[Myelitis]]

==References==
{{reflist|2}}

==External links==
* [http://www.neuro.wustl.edu/neuromuscular/mother/mpain.html NEUROMUSCULAR DISEASE CENTER Washington University]  a more comprehensive list

{{Pain}}
{{Myopathy}}
{{Common Cold}}

[[Category:Symptoms]]
[[Category:Soft tissue disorders]]


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