• Welcome to Phoenix Rising!

    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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  1. S

    D lactate and fatigue/lethargy

    Hi everyone. I am not a ME/CFS sufferer but I feel compelled to share my experience with someone in case it is of value. I have experienced bouts of heavy fatigue, especially in the morning, and very unrefreshing sleep. I recently discovered that this is very likely occurring after I have a...