A member asked:

Is sour breath a symptom of something serious ?

A doctor has provided 1 answer
Dr. Bert Bergland answered

Specializes in Family Medicine

Breath: Interestingly, foul breath or "sour" breath can signify other disease processes. Obviously, dental hygiene would be considered, but also sinus infections, throat infections, liver disease, kidney disease, and even diabetic issues can cause changes in breath. If you have other symptoms i.e. Fever, fatigue, diminished urine output or yellow tinge to your skin or whites of your eyes, see your docto.

Answered 10/4/2016

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