Histamine Intolerance could be one of the root causes… your PCP, specialists will not even touch on this or they even never heard of because it does not have the diagnose code like migraine headache, abdominal pain, or endometriosis, BUT it has very wide range of signs or symptoms my patients come to see me for. Even you do not even think long haul covid patient have something to do with this? Yes, it is. One of my patients I have consulted while I was in Japan last year came to see me when I reopened my clinic in March. I told her that acupuncture treatment might help to restore her wracked vagus nerve to be aligned again but one of her symptoms was frequent wake up at 1 AM. Almost always 1 AM for last two years since she got Covid. After trying this and that, she started sleeping soundly after addressed her histamine level. She was surprised by it and so did I. What I am saying is it is wise to know what histamine intolerance will cause these signs and symptoms along with others like candida (yeast) overgrowth. It is wise to explore WHAT is in the first place causing your health issues. It is always have the beginning point (root cause).
I added Signs and Symptoms list on this page. Please take a look.