10 Common Bitter Taste in Mouth Causes
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Chronic Dry Mouth
Adequate saliva helps limit bacteria in the mouth, and a lack of it may lead to an overgrowth. A chronic dry mouth, otherwise known as xerostomia, may be caused by medications, hay fever or other disorders. Stress and anxiety are other common causes of dry mouth.
A chronic dry mouth can sometimes result in a lingering bitter taste. Xerostomia should be investigated by a health care practitioner, as it may be a side effect of a more serious condition.
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