Intermittent fecal/sulfur breath odor
After scouring the web, I'm certain I'm not the only person with this problem, and not the only person who's been told they were imagining it. Anyway, the issue is I have intermittent odors when I talk (yes, I've been to the dentist 10+ times-- all say my oral hygiene is on point and xrays and inspections showed nothing). The only time it's practically non-existent is when I eat an unhealthily low-carb diet. Like others online, I've had CT scans, Barium swallows, endosocopy/colonoscopy, screening for parasites (getting one more from an IDS before crossing that off my list). All showed up negative. I tested positive for SIBO, but after researching that for the past 3 years, I'm certain SIBO is more of a symptom than a primary causal problem. Furthermore, even when I treated SIBO with heavy antibiotics, it did absolutely nothing for my breath-- and yes I was cleared of SIBO after a couple rounds of work. yet, the moment I eat carbs, I still get a "did someone just s*it themselves?" comment.
I guess what I'm getting at is I'm tired of doctors just saying it's IBS and SIBO and then proceeding to do zero investigating afterwards. I want to get down to the root cause of this, but most doctors are either too apathetic or too incompetent to do anything. Are there any researchers who specialize in studying and diagnosing hard to find problems in the GI tract? Between the 3 GI docs, 2 ENTs, 2 NDs and 1 IDS, I just can't take normal doctors anymore. I want my life back and I want a specific root cause so I can work on progressing from there.
Further notes: Diarrhea actually cleared up when I ate junk food and I had zero bloating, albeit the odor remained.
Xifaxan and neomycin did nothing for the odor, nor did the elemental diet. I actually think the elemental diet made the smell as bad or
worse than before.
*******Nitazoxanide********** worked wonders for the month I was on it. Solid stools even with foods that normally cause my ibs to flare up.
It's exactly the reason I felt there was more going on to everything than just SIBO and IBS.
Interested in more discussions like this? Go to the Digestive Health Support Group.
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Have you ever had C-diff? I found, when C-diff positive, I occassionally had that problem myself. I have, however, smelled that type of breath on someone before they have eaten anything for the day. They did not actively have C-diff, but could be a carrier.
Would love to know some of the recipes the doctor gave you. Can you share.
I feel like I could have written this all myself — the embarrassment of intermittent fart breath has caused me to dread social interactions.
I have diagnosed celiac for 10 years, but don’t have any symptoms if I eat gluten. I suspect I might have h2s sibo but my GI doesn’t think it’s a clinically valid diagnosis, so have been doing my own testing.
I have a few things that have definitely helped me (partnering with ChatGPT for ideas)
1) Pepto Bismol / Devrom (key ingredient is bismuth). This doesn’t solve the root cause but bismuth binds with hydrogen sulfide and neutralizes the bad smell. I don’t take it always since it’s bad on kidneys but for social events I typically take every few hours (up to max recommended daily dose). Important to start a day or 2 before you need it. Most recently was at a 4 day wedding trip, eating and drinking and nobody pulled back from talking to me (usually it would happen with 1 alcoholic drink).
2) Molybdenum supplements — this also binds with hydrogen sulfide, generally safe to use. This isn’t perfect but my breath feels less harsh (hard to explain) and definitely reduces frequency of smell but still have it. Added benefit of significantly reduced hangovers and for me lower heart rate while drinking (not sure if related symptom but my heart rate typically elevates when drinking)
3) Metamucil tablets (5x 3x / day). Not sure why this helps, but psyllium husk apparently combines with water and can help turn into a gel which can prevent leaky gut I suppose. This is recent for me in past week but have not had anyone complain so far since I’ve been on it so fingers crossed.
No idea what will work for you but haven’t seen these mentioned recently in this thread (besides someone mentioning metamucil also helped them).
Wishing everyone the best with their symptoms, it’s an awful disease
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2 ReactionsWelcome to Mayo Clinic Connect, @ucs91. I'm sorry you've had to deal with this breath issue. Thanks for all the suggestions you offered that may help others here in this discussion.
You mentioned you have diagnosed celiac for 10 years, but you don’t have any symptoms if you eat gluten. I'm sure you are not the only one. I'd highly encourage you to start a new discussion on this topic in the Mayo Clinic Connect Digestive Health support group, https://connect.mayoclinic.org/group/digestive-gastrointestinal-problems/.
You will note "Start a new discussion" in a blue font a little down from the top of the page.
Are there any foods or other environmental factor you've noticed that make the "fart breath" worse?
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1 ReactionI’m going through this I feel my only way is praying and believing a miracle from God!!!
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1 Reaction@casey101 I'm so sorry about your work experiences. I just started working in retail and I'm so scared I'm going to be known as the bad breath worker. Last night, a coworker stated someone accidentally farted just as I entered the break room and stared talking.
You had a remission of the problem for 6 years. Do you know what stopped the problem? You posted about losing weight, taking antibiotics, etc.
@cj123 have you had any updates to share? For the first time in my life I'm working full time in retail and it has been a miserable experience. It was a huge mistake to go into a job where I'm constantly face to face with people. I'm stuck because I need the health insurance. I had a coworker last night make the dreaded someone farted comment. I dread going to work today.
I'm not sure if my problem has gotten worse or if I'm getting more confirmation of the same problem because I now around people 5 days a week. Previously I worked from home 80 to 100 %.
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1 Reaction@laceys63 Hey Lacey. I suffer from the exact same issues. Did you find any help? I have only been successful with a few mouthwash’s that only work temporary. Like ProFresh and Good Breath. Idk what else to do. I have no friends or a social life because of this. When I go to the Dr or dentist they ignore my issue. Please let me know.
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1 Reaction@noble77 - this post from @martft4 describes what she did when her breath became off-putting https://connect.mayoclinic.org/comment/284085/. Hoping it's helpful.
Tagging a few others on Mayo Clinic Connect who may know something about having feces breath and how they or others they have known or have read about have dealt with this @jlharsh @jimthescientist @kim1003 @princess007 @daisymaisy.
@docjay1961, what did you do about this issue?
Hi @noble77. You mention having the same bad breath problems as @laceys63, struggling to figure out if something in maybe your GI is causing it. It is frustrating to keep trying mouthwashes that work for a time but then you have to switch and try another one. I am hopeful you will find help you need as you keep trying to figure out what is going on, perhaps a connection elsewhere like your gut.
I did just listen to a podcast Mayo Clinic’s “On Nutrition” put out that you may find helpful. I learned a lot about my mouth, how it’s connected with my general health, and even where medical professionals are in terms of understanding it all (or not). You will want to scroll down to find the episode:
- “Whole-Body Care, Starting With a Smile” (01/16/2026) https://mcpress.mayoclinic.org/podcasts/on-nutrition/
I would love to hear what you think about the information shared on the podcast.
Do you think you will look for a dentist and/or primary care doctor willing to help you?
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