Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS)
https://www.mayoclinic.org/diseases-conditions/chronic-fatigue-syndrome/symptoms-causes/syc-20360490
WebMay 11, 2023 · Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is a complicated disorder. It causes extreme fatigue that lasts for at least six months. Symptoms worsen with physical or mental activity but don't fully improve with rest. The cause of ME/CFS is unknown, although there are many theories.
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