What causes bad breath from the nose?

Question
Hello doctor,
I had bad breath 10 years ago, so far it has not been cured. I went to the ENT department many times, but the doctors concluded that there was no problem with the nose. However, my mouth is not bad. Once, when I went to the doctor, the doctor told me that I had acid reflux, so my nose smelled bad, but I went to a gastroscopy and it was okay, only mild inflammation. So the doctor told me the cause of the bad smell in the nose? I hope you answer, thank you doctor.
Dao Van Giang (1993)
Answer
Answered by Specialist Doctor I Vu Huy Hien - Department of Gastroenterology - Endoscopy, Vinmec Times City International Hospital.
Hello,
With the question “What causes bad breath from the nose? , the doctor would like to answer as follows:
Your nose breathes out a bad smell, the possibility of you having acid reflux is very high, sometimes there may not be a picture of esophageal reflux disease, but in fact Very common acid reflux into the palatine cavity.
To reduce this, you should note: Eat less in the evening, have a light meal (including drinking water should be limited), limit eating and then go to bed.
If the above is not improved, you should go back to the Gastroenterology and Odonto-Stomatology specialist to re-determine the cause of those inconveniences.
If you still have questions about bad breath, you can go to the hospital of Vinmec Health System for further examination and advice. Thank you for trusting and sending questions to Vinmec. Wishing you lots of health.
Best regards!