Long COVID histamine problems, MCAS down to two foods, nearly normal after leaving mould
- Condition
- Long COVID
- At worst
- Mild (working or studying, with limits)
- Ill before improving or writing
- Not stated
- Last post
- Apr 2026
In their words
- Condition: Long COVID
Covid caused me histamine issues yes but not MCAS.
In context ↗ - At worst: Mild
my MCAS has gone haywire - from mild to insane. I am allergic to literally everything.
In context ↗ - Now: Near normal
Didn’t take it and I am doing well. Travelling, hiking, eating fine just avoiding gluten, dairy, milk and fatty foods.
In context ↗ - Began after: COVID
Covid caused me histamine issues yes but not MCAS.
In context ↗
Read from 7 of their posts and comments; links to the 6 this page draws on
Summary
They had long-COVID histamine problems and lifelong mild MCAS. Herbal antibiotics in February 2024 sent the MCAS 'from mild to insane': they were down to two foods and reacting to pollen, smells and sounds. They improved over months and, after moving out of a home with hidden mould and avoiding mould, reported in April 2026 that they were travelling, hiking and eating fine, still avoiding gluten, dairy, milk and fatty foods.
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What they tried
What they credit
Their words about each treatment
- herbal antibiotics · Much worse
after taking herbal antibiotics which wipied out I'm sure good bacteria ... I took antibiotics in Feb 2024 and my MCAS has gone haywire
- restricted diet (avoiding gluten, dairy, milk and fatty foods) · Helped
eating fine just avoiding gluten, dairy, milk and fatty foods
In context ↗ - probiotic · Not said
Did a stool test the other day and starting the probiotic now.
In context ↗ - otc antihistamine · Worse
I’m not tolerating otc antihistamine ... I’m not tolerating antihistamines or the like
- mold avoidance · Helped a lot
Moved out of a home that had hidden mold and doing mold avoidance.
In context ↗
Approaches: Diet · Mould avoidance
Their path
What they say at each step doesn’t fit the worst point or outcome above on the severity scale, so the steps are listed as they describe them. Dates are when they posted.
| When | What happened | After |
|---|---|---|
| onset | COVID left them with histamine issuesCovid caused me histamine issues yes but not MCAS.In context ↗ | |
| February 2024 | herbal antibiotics sent MCAS from mild to severeI took antibiotics in Feb 2024 and my MCAS has gone haywire - from mild to insane.In context ↗ | |
| 2024-05-08 | down to two foods, reacting to everythingWas down to 2 foods and now up to 5.In context ↗ | |
| 2025-01-28 | no longer starving or anaphylactic to smellsbut no longer starving and no longer anaphylactic to all smellsIn context ↗ | Mold avoidance / CIRS protocol |
| 2026-04-22 | travelling, hiking and eating most foods after leaving a mouldy homeDidn’t take it and I am doing well. Travelling, hiking, eating fine just avoiding gluten, dairy, milk and fatty foods.In context ↗ |
Adverse events
- Antimicrobial botanicals (other)“after taking herbal antibiotics which wipied out I'm sure good bacteria as prior to that I was eating 35-40 foods” In context ↗ Gut side effects
- Antimicrobial botanicals (other)“After antibiotics I’m reacting to everything including pollen, smells, sounds and most foods.” In context ↗ Made symptoms worse
- H1 antihistamines (unspecified)“I’m not tolerating otc antihistamine” In context ↗ Side effects
Symptoms mentioned
Their words about their symptoms
- Mast cell (MCAS) & allergies
my MCAS has gone haywire - from mild to insane
In context ↗ - Light & noise sensitivity
After antibiotics I’m reacting to everything including pollen, smells, sounds and most foods.
In context ↗
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