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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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  1. M

    Chronically high total IgM

    I have quite high IgM levels, that shocked my internal medicine doctor. He didn't believe it was correct, and ran the test again, and it was indeed correct. My total IgM continues to be high enough that an immunologist said I should be monitored for hematologic malignancies. She said high IgM is...