I do have some kind of histamine/amine issue maybe mild mast cells activation. Pretty sure I wouldn’t get diagnosed. A histamine issue could cause blood vessels to dilate and make blood pool, which reduces oxygen circulation in the body, over time that could damage nerves causing SFN it would also cause symptoms of low blood pressure and racing heart as it tries to pump blood back up the the upper part of the body .
However I also think this type of response can be caused by other things.
@MCASMike I popped over to PR rising today to look up info in regards to MCAS.
For me I believe collagen is at the root, and mma. With this last crash it was discovered that my methylmalonic acid was life threatening high at almost 17,000 (s/b no higher than 29). The mma came down right away with B12, but the damage is not reversing. My red blood cells are always large being at the top or over the top of the range. I've been focusing on trying to get by B12 up, so that my red blood cells will normalize, so that they will be small enough to reach the smallest areas and therefore reverse the vascular damage and the neuropathy and the horrific headache (and occular damage). I've also been focusing on nutrients (IV NAD, IV ALA, bio-available silica, etc), PEMF and whole body vibration to improve my vascular system, but not is improving. (I'm doing injectable methylcobalmin daily, along with a full MTHFR protocol)
Friday, during an appointment with my bio-identical hormone doc she pushed a little harder questioning why my body is being so resistant to "nutrients" - not picking up even the injected B12. I told her my veins were just shot, and can't believe they aren't better, and neither is the neuropathy, or the horrific headache or vision. The more I thought about it, I had an NAD IV on Thursday and felt pretty good, and went to the dentist and within a few hours was knocked completely down and I knew it was an MCS/MCAS issue. My chemical sensitivities have indeed just gotten worse over the last few months rather than better. And my skin is excruciateling dry. Why? The phlebotomists continually complain about my veins and thick blood. I went to do a search yesterday regarding thick blood, and ruled out pretty much everything including fibrin because I take broad spectrum enzymes to deal with that. But histamine came up. BINGO! But I don't understand why?
Then when looking at anti-histamine foods - fish oil was listed. I've been taking 4-6 tablespoons a day of the stuff and it helps ...... a bit. I was taking it not because it's an anti-histamine but because it helps the brain "a la Dr. Nemechek and coat-hanger pain". Now I know why it's been helping. I added in quercetin, stinging nettles, and histaminum yesterday and things are a tiny bit better.
I've ordered freeze dried kidney (and some others) from Ancestriel Supplements which is high in DAO which I am hoping will help this dramatically. I've taken H1&2 blockers in the past and they help with some symptoms, but not much. At this point I'll go back on them, because the damage being done to my body is horrific.
@MCASMike I'm glad you posed the question, and
@xebex I'm thankful you posed the hypothesis. I think it is sound and it is exactly what I've been living and putting together.