CIRS and Sick Building Syndrome
It almost always starts with a building.
You move somewhere new. Or a pipe goes. Or the roof takes on water one winter and nobody deals with it properly. Months later you're exhausted, foggy, aching, and suddenly reacting to foods and smells that never bothered you in your life.
So you go to a doctor. They run the standard panel, it comes back unremarkable, and you get told it's stress. Or anxiety. Or that you're just run down and should try to relax more.
Meanwhile you've noticed something they haven't asked about: you feel noticeably better when you're away from the house, and worse within a day of coming back.
That pattern is real, and there's a biological explanation for it.
Chronic inflammatory response syndrome (CIRS) is what happens when exposure to a water-damaged building kicks off an innate immune response that never switches back off. The inflammation keeps running after you leave, which is exactly why the illness doesn't just fade once the exposure ends.
Why does standard testing miss it?
Because a routine blood panel isn't looking for any of this.
CIRS runs through the innate immune system, inflammatory signalling and hormone regulation, and the markers involved simply aren't on a standard workup. In a study of people made ill by water-damaged buildings, MMP9 was elevated in 22 of 26 patients, MSH was abnormal in 25 of 26, and there were abnormalities in leptin and VEGF.
None of those show up on the tests most people get handed.
So the panel comes back clean and you get told nothing's wrong. What actually happened is that nobody measured the right things.
That gap is the single biggest reason people spend years without an explanation.
Why does it keep going after you leave?
Your body has a dedicated system for ending an inflammatory response once the threat has passed. In CIRS, that shutdown doesn't complete.
Low MSH is central to this. MSH belongs to a family of peptides that switch on your body's main anti-inflammatory pathway, the one carried by the vagus nerve. Experimental work shows melanocortin peptides activating that pathway and protecting animals in severe inflammatory states.
Weaken that signal and inflammation that should resolve just keeps running instead.
Which is why getting out of the building, essential as it is, often isn't enough on its own. The original trigger is gone but the response is now self-sustaining, and the mycotoxins are still recirculating through your system.
I've gone deep on that circuit in the vagus nerve and CIRS, including why it explains feeling genuinely terrible while your labs look perfectly normal.
What are you actually being exposed to?
"Mold" undersells it considerably.
A building with sustained water damage grows a whole mixed community of organisms, and the air ends up carrying mycotoxins, fungal fragments, bacterial endotoxins, actinomycetes and volatile compounds. Your immune system is reacting to that entire mixture, not to spore counts alone.
Which is part of why air testing can come back reassuring while everyone in the building stays sick. And why finding Stachybotrys matters mostly as a signal that the water problem has been serious and long-running.
Treatment: the order matters
Get out of the exposure. Remediation or relocation comes first. Nothing else works reliably while the input continues.
Lower the body burden. Mycotoxins recirculate through bile, which is exactly why they persist. Binders interrupt that cycle. Cholestyramine, the binder in the Shoemaker protocol, lowered plasma ochratoxin A and increased fecal excretion in animal studies, and cut the kidney damage that toxin causes. Clay binders significantly reduced mycotoxin biomarkers in randomized, placebo-controlled human trials, with aflatoxin-albumin levels dropping against placebo and urinary markers falling by up to 58%.
That same Shoemaker study included a double-blind placebo-controlled arm testing cholestyramine directly in this patient group. Symptoms and visual contrast sensitivity improved on the binder and not on placebo, and the placebo group improved once they crossed over to it.
The full protocol, including why drainage has to come before binding and the timing mistakes that stall most people, is in supplements for mold exposure.
Then address what hasn't recovered. Inflammatory signalling, hormone regulation and autonomic function often need attention once the exposure and the body burden are handled.
Articles in this section
- Supplements for mold exposure Which binders work, why drainage comes first, and how to sequence a protocol.
- The vagus nerve and CIRS Why you feel exhausted and foggy while a standard panel looks normal.
- Does mold cause acid reflux? How mold exposure produces reflux and heartburn through the airways and the immune system.
- Can mold cause swollen lymph nodes? What swollen glands mean after mold exposure, and which patterns need attention.
More on testing and recovery is being added as I work through it.