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=========================================================== Post Nasal Drip and Nasal-Sinus Congestion Will Transform a Case of 'Normal' Breath into BAD Breath and 'Bad' Breath into HORRIBLE Breath! ===========================================================
Bad Breath is very closely related to post nasal drip,excess mucus, sinus problems, your tonsils, and tonsiloliths.
The bacteria which cause bad breath and sour/bitter/metallic tastes are anaerobic (live without oxygen). Their goal in life is to break down proteins in foods that we eat. However, under certain conditions, they will also start to break down proteins found in mucus and phlegm.
Therefore, those people who suffer from post nasal drip, sinus problems, and other such ailments are more prone to bad breath and lousy tastes because bacteria use mucus as a food source and start to extract sulfur compounds from amino acids that make up proteins found in all this excess mucus.
Scientifically, anaerobic bacteria that cause bad breath "love" amino acids Cysteine and Methionine, which are building blocks of proteins that are found in mucus (and phlegm) and in dairy foods, too. In fact, many people notice that when they drink too much milk or eat too much cheese they end up with more mucous or phlegm in their throat. This is a natural reaction for many people and unfortunately, ends up causing more bad breath and lousy taste.
If you still have your tonsils, you may be harboring a higher number of bacteria which can lead to an "interesting" and very often misunderstood phenomenon, called TONSILOLITHS. Literally translated, they are "tonsil stones" produced by conglomeration of mucus draining down back of throat and volatile sulfur compounds created by bacteria which easily end up in "nooks and crannies" of tonsils, every time one swallows. I can't tell you how many stories I've heard from my patients who asked their dentist what these objects were, and more often than not answer was 'food particles'. This couldn't be further from truth!
Medication and Drugs MAY help Prevent Post-Nasal Drip, But At What Cost?
There are dozens of different over-the counter nasal decongestants and antihistamines you can use to help relieve congestion and dry up excess mucus, and some of them are very good at what they claimÖ but mostly they are TOO GOOD! They create an extremely dry mouth, which exacerbates bad breath. And even in cases where dry mouth side effect is minimal, when you stop taking that medication problem comes back, and almost always with a vengeance! This is because in some cases, your body will actually develop a resistance to any antihistamines or nasal decongestants, especially nasal sprays (be careful, because many sprays are habit forming!)