- Location: 1507 S Hiawassee Rd Ste 105, Orlando, FL 32835
Most bad breath starts in the mouth. But when brushing, flossing and a dentist visit have not fixed it, the cause is sometimes further down — in the stomach or esophagus. Orlando Gastroenterology evaluates digestive causes of persistent bad breath at four Orlando-area clinics.
Roughly nine times out of ten, halitosis comes from the mouth: bacteria on the tongue, gum disease, dry mouth, or food debris. Start with your dentist. That is not a brush-off — it is the highest-yield first step, and it is quick.
What points away from the mouth is bad breath that persists after good dental care, especially when it comes with heartburn, regurgitation, a sour or bitter taste, burping, nausea, or a feeling of food coming back up.
When stomach contents reflux into the esophagus, the acid and partially digested food can produce a sour smell and a persistent bad taste. Reflux is the most common digestive cause of halitosis. See our page on acid reflux and GERD.
H. pylori is a stomach bacterium best known for causing peptic ulcers. It has also been associated with bad breath in some patients, and it is straightforward to test for.
In gastroparesis, the stomach empties too slowly. Food sits and ferments, which can produce noticeably unpleasant breath, often alongside nausea, bloating and vomiting of undigested food hours after eating.
SIBO means excess bacteria in the small intestine. Those bacteria ferment food and produce gas, which can contribute to bad breath as well as bloating and belching.
Bad breath can also be caused by hiatal hernia, a swallowing disorder that lets food collect in the esophagus, chronic sinus infection, poorly controlled diabetes, or kidney or liver disease. Some medications cause dry mouth, which makes breath worse indirectly.
We start with your history: when the smell is worst, what you notice alongside it, what dental treatment you have already had, and what medications you take. From there testing may include a breath test for H. pylori or for SIBO, or an upper endoscopy to look directly at the esophagus and stomach.
The point of testing is to avoid guessing. Treating reflux will not help SIBO, and a course of antibiotics aimed at H. pylori does nothing for a hiatal hernia.
Book an appointment if bad breath has persisted despite good oral hygiene and a dental check, or if it comes with heartburn, regurgitation, difficulty swallowing, nausea, unexplained weight loss, or black or bloody stools. Those last two warrant prompt evaluation.
Call (407) 445-9224 or text (407) 759-5041. We see patients at MetroWest Orlando, East Orlando, Kissimmee and Clermont. Spanish-speaking providers are available.
Yes, though it is less common than a dental cause. Reflux, gastroparesis, SIBO and H. pylori infection can all contribute. If your dentist has ruled out an oral cause, a digestive evaluation is reasonable.
A dentist first. Most halitosis is oral in origin and dental treatment resolves it quickly. Come to us when that has been done and the problem remains.
It depends on the pattern of your symptoms. A breath test can identify H. pylori or SIBO; an upper endoscopy can show reflux damage, a hiatal hernia or gastritis.
On its own, rarely. Combined with trouble swallowing, unexplained weight loss, persistent vomiting, or black or bloody stools, it should be evaluated promptly.
Medically reviewed by Dr. Sri Pothamsetty, MD, AGAF
Related: Acid reflux & GERD · Peptic ulcers · Gastroparesis · SIBO
