Ten years of covering my mouth. Here is the journal.

I am Marcus. I am 41, I dispatch for a trucking company in San Antonio, and from roughly 2015 to 2025 I had bad breath that I could not fix. Not morning breath. All-day breath, the kind where a coworker offers you gum twice in one shift and you understand what she is telling you. I brushed three times a day. I used every mouthwash on the shelf. I chewed so much gum my jaw clicked. Nothing stuck.

This site is the journal I kept, cleaned up so it is useful to someone else. I am not a dentist or a doctor. I am a guy who tracked a problem for a long time with a notebook and, later, a cheap breath meter, and who eventually got to the bottom of it, in pieces, over about eighteen months. If you have the same problem, I want to save you the decade.

What it turned out to be

Three things, not one. That is the part nobody told me and the reason nothing worked: I was treating one cause at a time while the other two kept going.

Tonsil stones. An ENT found them in early 2024 after a dentist had checked my gums twice and found nothing wrong. The white bits I sometimes coughed up were not food. They were calcified bacteria sitting in the pockets of my tonsils, and they smelled exactly like what people had been smelling on me for years. Getting those addressed was the single biggest change.

Tongue coating. The back third of my tongue was the color of a used dish sponge. I had never looked. The ADA's MouthHealthy page on bad breath says most odor comes from bacteria on the tongue, and once I started scraping instead of brushing it, the daytime breath dropped a notch.

Dry mouth. I work nights, I breathe through my mouth when I sleep, and I drink coffee and energy drinks for ten hours straight. My mouth was a desert. Saliva is what keeps the bacteria down, and I had none. Fixing that was the slowest piece.

The last bit, the sour morning taste that stayed even after all three, is where the probiotic came in. I started ProDentim in April 2025, one tablet at night after brushing, and by the end of May the morning readings on my meter were the lowest I had recorded. I write about that in the third entry, including the two months where I thought it was doing nothing.

What is in the journal

Three long entries, written after the fact from the notebook:

The tongue entry is about the thing I should have checked first and did not, how to scrape without gagging, and why brushing the tongue is not the same.

The dry mouth entry is about night shifts, mouth breathing, and why my morning breath got worse after forty even though my habits did not change. The NIDCR page on dry mouth was where I first understood what was happening.

The mouthwash entry is the confession. I used alcohol mouthwash twice a day for eight years and it was making the problem worse the entire time. That entry also covers what I replaced it with.

How I measured

A $30 handheld breath checker from the internet, which I later learned is mostly a gas sensor that reacts to sulfur compounds and also to humidity, alcohol and mint. It is not a medical instrument. But it was consistent with itself, and when I took readings at the same time every morning before brushing, the trend over months was clear. I also had my wife rate me, one to five, once a day. She was not gentle. Her numbers tracked the meter's numbers closely enough that I trust both.

What I want you to take from this

Get your tonsils looked at by an ENT, not just your gums by a dentist. Look at your tongue in good light. Figure out whether your mouth is dry and why. Stop the alcohol rinse. Then, if there is still a morning problem, consider a probiotic, and give it two months.

That is the whole decade in five sentences. The entries have the rest.

Mouthwash Made My Breath Worse for Eight Years. What I Use NowAlcohol mouthwash twice a day for eight years dried my mouth and masked the smell. What I use instead, and how a nightly probiotic replaced the rinse.Dry Mouth at Night: Why Morning Breath Got Worse After 40Night shifts, mouth breathing and ten hours of coffee left my mouth with no saliva. Why that makes breath worse, what I changed, and where a nighttime probiotic fit.The Tongue Is Where Bad Breath Lives: What to Check FirstTen years into bad breath I finally looked at the back of my tongue: how to scrape without gagging, why brushing is not enough, what the coating is.

Marcus Reyes is a dispatcher in San Antonio who spent ten years cupping his hand over his mouth before meetings. He keeps this journal so the next person does not have to guess for a decade.