Can bad breath be caused by stomach problems?

Chronic stomach acid reflux (gastroesophageal reflux disease, or GERD) may be associated with bad breath. Digestive conditions such as acid reflux and gastroesophageal reflux disease (GERD) are causes of bad breath. Both of these digestive conditions can delay or prevent food from being processed efficiently in the stomach. When food doesn't move through the digestive system, it can start to break down.

Small amounts of undigested food can even regurgitate and cause bad breath. Dentists can also detect GERD in patients when they notice an inflammation of the throat and acid erosion on the teeth. These are two symptoms of GERD (gastroesophageal reflux disease), a common digestive disorder.

Bad breath

may be due to the reappearance of undigested food, or it may be that irritation caused by stomach acid is causing postnasal dripping.

Ask your doctor for help if you frequently have heartburn. GERD can cause bad breath when stomach acid mixes with food and possibly bacteria. The fishy smell can occur when kidney failure affects the respiratory system and causes respiratory problems. But a quick breath test can save you from more than just an uncomfortable social situation: it could save your life.

Because it's difficult to assess how your own breath smells, ask a close friend or family member to confirm that you're concerned about bad breath.


is a common condition and, in most cases, is caused by a buildup of bacteria in the mouth due to gum disease, food, or plaque. The researchers then used mass spectrometry technology to analyze breath samples for signs of heart failure related to molecular and chemical compounds. Anyone who has been vomiting for more than 24 hours may notice that their breath smells sour and stools.

If a person has improved their oral hygiene routine and has taken over-the-counter treatments and bad breath persists, they should see a doctor. However, fruity bad breath or an acetone-like odor (commonly used in nail polish remover) can also indicate a serious complication in diabetic patients called ketoacidosis. Although it's a liquid, alcohol can dry out your mouth, encouraging the growth of bacteria that cause halitosis, the medical term for bad breath. If the breath of a person with diabetes smells like acetone, this could indicate diabetic ketoacidosis.

Whether it's the coffee breath on your morning trip to work, forgetting to floss, or having a dry mouth, a bout of halitosis or bad breath can ruin your day (and that of others). Some people worry too much about their breath even though they have little or no smell in their mouths, while others have bad breath and don't know it. Most people will have bad breath at least once in their lives, but it's unusual for breath to smell like urine. If a person suspects that poor dental hygiene or a dental abscess is causing a breath that smells like faeces, they should schedule an appointment with a dentist.

Using a preprogrammed electronic nose, which detects different profiles of volatile organic compounds (VOCs) in exhaled breath, researchers from the University of Latvia examined breath samples from 475 subjects, including 252 patients with lung cancer, 223 patients with different lung conditions and healthy volunteers, 265 smokers and 210 non-smokers. From an intestinal obstruction to a tooth abscess, there are several possible causes of a stool-like smell on the breath.

Aimee Janoski
Aimee Janoski

Devoted bacon scholar. Professional internet practitioner. Lifelong web evangelist. Typical tvaholic. Passionate internet enthusiast.

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