Bad breath can arise from a problem in your mouth or throat, or from metabolic processes. Depending on the cause, your breath may smell sweet, sour, rotten, musty, fishy, or like ammonia.

But not wanting bad breath and understanding what causes it are two different things. Here's what's behind unpleasant mouth odor – and how to prevent it. What is halitosis?

Bad breath is something that almost everyone experiences at one point. Sometimes it's just "morning breath" or a side effect ...

Few things are as off-putting as having bad breath. We inwardly cringe or turn away when a friend or co-worker has stinky breath, and identifying an unpleasant odor coming out of one's own mouth in ...

The odors released during this conversion can make their way to your breath. Keto breath may smell like acetone—the same stuff used in nail polish remover. However, it can also have a fruity smell.

A person’s breath may smell like urine or ammonia due to numerous causes, including nasal congestion, stomach infection, and diet. A foul taste in the mouth may indicate bad breath. Read on to ...

This can cause the breath to have a sour, pungent odor and smell like the undigested food in your stomach. Kidney problems “If your kidneys aren’t functioning correctly, ...

What causes bad breath? 1. Acid reflux. Acid reflux (also called GERD when it becomes chronic), is caused by stomach acid flowing back up the esophagus, ... accompanied by a sour odor. 2.

Learn why bad breath persists after brushing in 80% of cases, including causes like dry mouth, GERD, and gum disease plus treatment options.