Chronic Bad Breath: Seeking Solutions After Decades of Discomfort - Family Medicine

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Chronic halitosis that has been a concern for several decades?


Hello, doctor.
I have been told that I have bad breath since the Chinese middle period, and I have been seeking the cause and solution for many years.
Currently, I do not have any periodontal diseases or related oral conditions.
I get my teeth cleaned every six months and have undergone a carbon-13 (I think) urea breath test for Helicobacter pylori, which was normal.
I do not have gastroesophageal reflux or post-nasal drip issues, and abdominal ultrasound as well as liver, gallbladder, and kidney functions are all normal.
I regularly stay hydrated, occasionally brush my tongue, brush my teeth in the morning and evening, rinse my mouth after meals, and use an alcohol-free mouthwash before bed.
However, I still have bad breath.
Even after brushing my teeth and using mouthwash, I can still detect the original odor mixed with the taste of toothpaste or mouthwash, which only temporarily masks the smell.
Over time, my mouth develops a dry, sticky, and bitter sensation.
The only time I feel there is no odor is after eating when a large amount of food and saliva thoroughly "cleans" my mouth.
I suspect that I may have insufficient saliva production.
For the past two years, wearing a mask has somewhat alleviated the issue, but as soon as I speak or exhale, I can quickly sense an unpleasant odor in the mask.
I have not yet sought medical attention specifically for bad breath and am unsure which specialty to consult.
I am also concerned that any examinations may yield no results and feel futile.
I kindly ask for your advice and direction.
Thank you very much!

A De, 40~49 year old female. Ask Date: 2022/10/13

Dr. Lin Zhebin reply Family Medicine


Hello: Common causes of halitosis include oral diseases (including tonsillitis), respiratory diseases (including nasopharyngitis), gastrointestinal diseases, kidney diseases, and liver diseases.
Based on your description, the examinations of the aforementioned organs seem to be normal; however, it appears that there has not been an evaluation of endocrine disorders, such as diabetes mellitus or thyroid diseases.
I recommend consulting with an endocrinologist or a family medicine physician for this aspect.
Additionally, you mentioned insufficient saliva production, which may warrant consideration of xerostomia.
For this issue, I suggest seeing a rheumatologist or a family medicine physician.

Reply Date: 2022/10/13

More Info


Chronic bad breath, or halitosis, can be a frustrating and embarrassing condition, especially when it persists despite good oral hygiene practices. Based on your description, it seems you have already taken significant steps to rule out common causes of bad breath, such as periodontal disease, gastroesophageal reflux disease (GERD), and infections. However, there are still several potential factors that could contribute to your ongoing issue.

1. Dry Mouth (Xerostomia): One of the most common causes of bad breath is dry mouth, which can occur due to various reasons, including medication side effects, dehydration, or certain medical conditions. Saliva plays a crucial role in washing away food particles and bacteria in the mouth. If your saliva production is insufficient, it can lead to a buildup of bacteria that produce foul-smelling compounds. You mentioned that you feel a dry, sticky sensation in your mouth, which could indicate that you are experiencing dry mouth. Staying hydrated is essential, but you might also consider using saliva substitutes or mouthwashes specifically designed to combat dry mouth.

2. Tongue Coating: Even with regular brushing, the tongue can harbor bacteria and food particles, leading to bad breath. You mentioned that you occasionally brush your tongue, but it might be beneficial to incorporate this into your daily routine more consistently. Using a tongue scraper can effectively remove the coating on your tongue, which may help reduce odor.

3. Dietary Factors: Certain foods, such as garlic, onions, and spices, can contribute to bad breath. Additionally, a diet low in carbohydrates can lead to ketosis, which can also produce a distinct odor. Consider keeping a food diary to identify any potential dietary triggers that may be contributing to your halitosis.

4. Underlying Medical Conditions: While you have ruled out several conditions, there are other medical issues that can cause bad breath. For instance, sinus infections, post-nasal drip, or even systemic conditions like diabetes can lead to halitosis. If you have not already done so, it may be worth consulting with an ear, nose, and throat (ENT) specialist to evaluate for any sinus-related issues.

5. Oral Hygiene Products: While you are using mouthwash, it’s important to ensure that it is effective against bad breath. Some mouthwashes contain alcohol, which can dry out the mouth and exacerbate the problem. Look for alcohol-free mouthwashes that contain antibacterial agents or zinc compounds, which can help neutralize bad breath.

6. Regular Dental Check-ups: Although you are already seeing a dentist for cleanings, it may be beneficial to discuss your specific concerns about bad breath with them. They can conduct a thorough examination and may suggest additional treatments or referrals to specialists if necessary.

7. Psychological Factors: Sometimes, the perception of bad breath can be influenced by anxiety or stress. If you find that your concern about bad breath is affecting your quality of life, consider speaking with a mental health professional who can help address any underlying anxiety.

In conclusion, chronic bad breath can stem from a variety of sources, and it often requires a multifaceted approach to address effectively. Since you have already ruled out many common causes, I recommend focusing on hydration, tongue hygiene, and possibly consulting with an ENT specialist. Additionally, maintaining open communication with your dentist about your concerns can lead to more tailored solutions. Remember, you are not alone in this, and with persistence, you can find a resolution to your discomfort.

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