All of us with ME-CFS know about pay-back (aka PEM, Post Exertional Malaise). It’s the worsening of symptoms that results from happenings outside our normal routine and from activities or situations that require us to use up more energy than we have available. It’s the result of stress, but what is stress for us would not be stress for a healthy person. When stressed, the body starts to go haywire.
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