I suffered from 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 breath