However I find it difficult to explain PEM and energy issues with autoimmunity alone.
I'm sure you do. If you've done your research, then you know that what I'm saying isn't something that gets much attention.
Can you explain PEM period? Because researchers still can't.
Like I said above,
"That's because other conditions don't use "PEM", they say "exercise intolerance". PEM is mostly a name used in CFS. While "exercise intolerance" is a little more ambiguous and vague, it can for sure mean the same thing."
No one has PEM, looks up that symptom, then thinks "Oh, so I guess I have CFS".
People only hear the term "PEM" after they've learned about CFS. And then they're like oh, so "Post Exertional Malaise"...... "yea, I have that."
Like Cort said, not too long ago...
It was ME/CFS experts, after all, not POTS or fibromyalgia specialists, who coined the term post-exertional malaise (PEM) decades ago
https://www.healthrising.org/blog/2...tigue-syndrome-and-hyperadrenergic-pots-meet/
There are definitely others out there that have PEM. Except, they have never heard of PEM, or CFS. And the doctor they see doesn't know about those two things either. But they'll probably discover an autoimmune disorder.
Going back to
Small Fiber Polyneuropathy ....
Scientific Advances in and Clinical Approaches to Small-Fiber Polyneuropathy: A Review
Immunohistopathologic evidence suggests that small-fiber dysfunction and denervation, especially of blood vessels, contributes to diverse symptoms, including postexertional malaise, postural orthostatic tachycardia, and functional gastrointestinal distress
Sound familiar? This is an autoimmune disease w/ multiple auto-antibodies involved.
Antiphospholipid Syndrome shows the same type of impaired aerobic capacity, with blood vessel clotting issues and damage to autonomic nervous system fibers.
Sticky Blood” – Antiphospholipid Syndrome, POTS, Chronic Fatigue Syndrome and Fibromyalgia – The Dysautonomia Conference #4
And sure enough....
Phospholipid autoantibodies in ME/CFS patients and antibodies against cardiolipin were described in 92–95% of ME/CFS patients in two studies.
https://www.sciencedirect.com/science/article/pii/S1568997218300880
There's also "PEM" in heart preload failure -
https://endmecfs.mgh.harvard.edu/heartpreload/
There's the PEM in cancer I'd linked to earlier. It's seen in POTS. And probably a lot of other conditions.
All this stuff has common denominators - bloodflow, blood pressure, blood volume, autonomic dysfunction, abnormal sympathetic activation, and for sure autoimmunity and fatigue.
A good 2019 article I recommend -
Fatigue, Sleep, and Autoimmune and Related Disorders
a growing literature indicates that fatigue is common in most autoimmune-related diseases, as well as among individuals with related immunodeficiency disorders
98% of individuals with autoimmune disease report that they suffer from fatigue