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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 (FM), long COVID, postural orthostatic tachycardia syndrome (POTS), mast cell activation syndrome (MCAS), and allied diseases.

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muscle burning

  1. chilove

    What could be causing sudden new symptom of weak and burning, aching muscles in my legs?

    Looking for suggestions on what could be causing a recent and sudden new symptom: Aching and burning and sore muscles in my legs? It started with my left knee suddenly giving out while I was walking but it didn't hurt, my knee would just sort of buckle. Then it progressed to that knee getting...