Particular medications, allergies, vitamin deficiencies and certain medical conditions can cause a bitter taste in the mouth. The taste bud fails to identify sweet, salty, and sour tastes in such a case. Poor dental hygiene and consumption of alcohol can give rise to a bitter taste. Practicing good oral hygiene and taking precautions against the underlying condition can prevent bitter taste in mouth from lasting for long.
HOW IS BITTER TASTE IN THE MOUTH DIAGNOSED?
Bitter taste in mouth can also be due to phenylthiocarbamide, which only some people can taste.