| ICD9 = | ICDO = | OMIM = | DiseasesDB = 30079 | MedlinePlus = 003088 | eMedicineSubj = | eMedicineTopic = | MeshID = D005221 |}}The word fatigue is used in everyday life to describe a range of afflictions, varying from a general state of lethargy to a specific work-induced burning sensation within one's muscles. It can be both physical and mental. Physical fatigue is the inability to continue functioning at the level of one's normal abilities. It