There can be various causes of bitter taste in mouth-
- Recurrent sinusitis
- Dryness of mouth
- Anything which causes inflammation in the mouth can damage the taste buds. Ill-fitting dentures or teeth and gums full of decay are some of the major culprits.
- Smoking can also destroy taste.
- Rarely problems like diabetes or underactive thyroid
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Regards
Dr. Gupta

