There may not be a bad breath test on the market, but there are a few things you can look for. Common bad breath symptoms include:
Buildup of Plaque -- Poor oral hygiene results in plaque buildup, an invisible film that forms over your teeth. Dental plaque is a breeding place for the bacteria that cause bad breath symptoms. If your dentist says you have a large buildup of plaque, bad breath may be a side effect.
"Bad Taste" in Mouth -- The bad taste in your mouth left behind by certain foods, tobacco and alcohol products can offend others. A bitter, sour or metallic taste is not only a bad breath detector, but could be a side effect of a health problem or medication you're taking.
Coating on Tongue -- A yellow or white film on your tongue can be a sign of an overgrowth of bacteria in your mouth. While you may be able to brush some of it away, it usually won't entirely eliminate the problem.
Dry Mouth -- Saliva helps wash away food particles and neutralize acids that cause tooth decay. The bacteria that cause bad breath symptoms thrive in a dry mouth, so it's important to keep your mouth hydrated to help prevent bad breath. Dry mouth is a normal occurance during sleep, which is why some people wake up with morning breath.
Post-Nasal Drip -- Sinus conditions, colds and allergies often coat your throat with mucus, which can emit an offensive odor. Mucus also protects bacteria from meeting with oxygen, which is needed to help kill the anaerobic bacteria that causes bad breath. The worse your cold, the worse your bad breath symptoms can get.