Understanding Bitter Taste in the Mouth Some individuals wake up in the morning with a bitter taste in their mouths, mistakenly attributing it to not brushing their teeth. However, the cause is not so straightforward. A bitter taste in the mouth can be a symptom of an underlying health condition. There are numerous potential causes for this unpleasant sensation. Poor oral hygiene, where food residue is broken down by saliva, can lead to bad breath and a bitter taste. Maintaining good oral care is crucial. Additionally, high stress levels, mental tension, improper diet, and long-term smoking habits can contribute to... Learn more