There are minor differences between adolescent ME/CFS and the adult ME/CFS. One is that abdominal pain is more common while this symptom is not even a part of some adult symptom criteria. In addition,
facial flushing is more common in teens.
I recall once when walking down the street in Lyndonville, I saw a teen with bright red facial flushing. He became ill within one or two days and remained ill for years.
I made the mistake once of calling this a rash, but it is not a rash, it is flushing – the same as an adult can have when taking niacin.
In some of the early outbreaks, this flushing rash is also mentioned and considered a standard symptom, one that involves the autonomic nervous system, as this part of the nervous system controls the diameter of the blood vessels.
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