Headache-Inducing, Numbing Breath Odor (Not Hygiene Related) - Worsened 10x After Metronidazole
Posted: Sat Dec 13, 2025 2:46 pm
My breath smells incredibly headache-inducing, numbing, and causes drowsiness in others. I am extremely meticulous about my oral hygiene and dental health, but regardless of how clean I am, there is a constant, 24/7 background smell coming from my breath that is at a "fainting-level" intensity.
It went undiagnosed for a long time, but 2 months ago, I was finally diagnosed with Giardia Lamblia. We treated the Giardia with Metronidazole (Flagyl), but after using this antibiotic, the numbing smell in my breath became 10 times worse.
I currently cannot stay in closed environments; if I have to, I constantly open windows and stay right next to them. I have been diagnosed with intestinal edema (inflammation) and Leaky Gut (intestinal permeability). I have visited countless doctors, but most were unknowledgeable or dismissive, so I got nowhere.
At this point, I am trying to fix my gut flora with probiotics, but I feel hopeless.
I am about to start using Enterosgel (I don’t know how much toxin it can hold, but I’m trying).
I used L-Glutamine and Collagen peptides for a week to control the edema.
Since Giardia destroyed my levels, I am supplementing B12 and Zinc.
I am also taking Saccharomyces Boulardii.
As I mentioned, the smell is currently at an incredible, headache-inducing level. I get terrible reactions from people outside. Honestly, I feel like I should be in the ER, but since doctors have no knowledge of this condition, I return empty-handed, so I stopped going.
The toxicity of this breath has reached a level where my consciousness feels like it's about to shut down. It feels as if my brain is a computer and someone is pressing the "power off" button. I am trying to hold on. I suspect I contracted this from a swimming pool 10 years ago, so I am dealing with a 10-year-old wreckage.
I really don't know what to do anymore. I’ve researched constantly but I feel stuck. Has anyone experienced this specific "headache-inducing/numbing" smell? Or does anyone have any ideas for a solution?
It went undiagnosed for a long time, but 2 months ago, I was finally diagnosed with Giardia Lamblia. We treated the Giardia with Metronidazole (Flagyl), but after using this antibiotic, the numbing smell in my breath became 10 times worse.
I currently cannot stay in closed environments; if I have to, I constantly open windows and stay right next to them. I have been diagnosed with intestinal edema (inflammation) and Leaky Gut (intestinal permeability). I have visited countless doctors, but most were unknowledgeable or dismissive, so I got nowhere.
At this point, I am trying to fix my gut flora with probiotics, but I feel hopeless.
I am about to start using Enterosgel (I don’t know how much toxin it can hold, but I’m trying).
I used L-Glutamine and Collagen peptides for a week to control the edema.
Since Giardia destroyed my levels, I am supplementing B12 and Zinc.
I am also taking Saccharomyces Boulardii.
As I mentioned, the smell is currently at an incredible, headache-inducing level. I get terrible reactions from people outside. Honestly, I feel like I should be in the ER, but since doctors have no knowledge of this condition, I return empty-handed, so I stopped going.
The toxicity of this breath has reached a level where my consciousness feels like it's about to shut down. It feels as if my brain is a computer and someone is pressing the "power off" button. I am trying to hold on. I suspect I contracted this from a swimming pool 10 years ago, so I am dealing with a 10-year-old wreckage.
I really don't know what to do anymore. I’ve researched constantly but I feel stuck. Has anyone experienced this specific "headache-inducing/numbing" smell? Or does anyone have any ideas for a solution?