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Fatigue is a state of tiredness (which is not sleepiness), exhaustion [1] or loss of energy. [2] [3]Fatigue (in the medical sense) is sometimes associated with medical conditions including autoimmune disease, organ failure, chronic pain conditions, mood disorders, heart disease, infectious diseases, and post-infectious-disease states. [4]
Prolonged fatigue is fatigue that persists for more than a month, and chronic fatigue is fatigue that lasts at least six consecutive months, which may be caused by a physical or psychological illness, or may be idiopathic (no known cause). [1] Chronic fatigue with a known cause is twice as common as idiopathic chronic fatigue. [6]
The ICD-11 of the World Health Organization (WHO) describes occupational burnout as an occupational phenomenon resulting from chronic workplace stress that has not been successfully managed, with symptoms characterized by "feelings of energy depletion or exhaustion; increased mental distance from one’s job, or feelings of negativism or cynicism related to one's job; and reduced professional ...
While fatigue is often prominent, it is "more than fatigue following a stressor". [6] Other symptoms that may occur during PEM include cognitive impairment, flu-like symptoms, pain, weakness, and trouble sleeping. [6] [4] Though typically cast as a worsening of existing symptoms, patients may experience some symptoms exclusively during PEM. [6]
The hallmark symptom is post-exertional malaise, a worsening of the illness which starts hours to days after minor physical or mental activity. This "crash" can last from hours or days to several months. Further common symptoms include dizziness, nausea and pain. [3] [10] The cause of the disease is unknown. [11]
In these vulnerable individuals, psychological stress or illness can cause abnormalities in inflammatory and stress pathways that regulate mood and pain. Eventually, a sensitization and kindling effect occurs in certain neurons leading to the establishment of fibromyalgia and sometimes a mood disorder .
The comedian George Carlin criticized the euphemism treadmill which led to progressive change of the way PTSD was referred to over the course of the 20th century, from "shell shock" in the First World War to the "battle fatigue" in the Second World War, to "operational exhaustion" in the Korean War, to the current "post-traumatic stress ...
A repetitive strain injury (RSI) is an injury to part of the musculoskeletal or nervous system caused by repetitive use, vibrations, compression or long periods in a fixed position. [1] Other common names include repetitive stress injury, repetitive stress disorders, cumulative trauma disorders (CTDs), and overuse syndrome. [2]