Bitter taste in the mouth - Definition

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A person can have a bitter taste in the mouth due to a food or beverage and the unpleasant feeling passes quickly. However, a persistent abnormal taste in the mouth that has no connection with food that has just been ingested is called dysgeusia. A bitter taste can come from smoking, infection, or a disease that interferes with the system of taste perception. It can also come from vomiting or acid reflux, certain medications, or hormonal disorders, mainly at the time of pregnancy. The bitter taste can also be associated with poor oral hygiene.