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    Created in 2008, Phoenix Rising is the largest and oldest forum dedicated to furthering the understanding of, and finding treatments for, complex chronic illnesses such as chronic fatigue syndrome (ME/CFS), fibromyalgia, long COVID, postural orthostatic tachycardia syndrome (POTS), mast cell activation syndrome (MCAS), and allied diseases.

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    PEM in CFS/ME must had abnormal muscle pain?

    Hello i'm new in this forum. Actually i'm a bit confused about the real definition of PEM. Is this condition like doubled your fatigue after exercise or increasing muscular pain or what? I'm still doubt if i having CFS/ME or not because the PEM thing. I hope someone will explained to me...