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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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Labs for ME/CFS


Senior Member
You can get your ESR measured, and tell your lab or doctor to give you a copy of the results. Low ESR results are NOT flagged by commercial labs, so you have to look at the paper with your own eyes. Less than 3 is not good (see below).

The most consistent laboratory abnormality in patients with CFS is an extremely low erythrocyte sedimentation rate (ESR), which approaches zero. Typically, patients with CFS have an ESR of 0 to 3 mm/h. A normal ESR or one that is in the upper reference range suggests another diagnosis.


Senior Member
Interesting couple years ago sed rate came back at 2 retested a few months later and came back a little higher

Cd8 lympochytes are like 1,700 with a ref range at 1,100 at the top

Cd4 normal-low