Feeling that the saliva is more bitter may be caused by dietary factors, oral problems, digestive system diseases, metabolic system diseases and other reasons. 1. Dietary factors: If you eat bitter gourd and other bitter food, your saliva may be bitter for a short period of time. 2. Oral problems: poor oral hygiene or dental caries can lead to food residues in the mouth, which, after fermentation and under the influence of bacteria, may lead to the secretion of saliva into a more bitter. 3. Digestive system diseases: gastroesophageal reflux disease (GERD) patients may have gastric reflux into the esophagus, and these gastric contents are often mixed with bile, gastric acid, and other digestive juices, which may lead to the phenomenon of bitter saliva. 4. Metabolic diseases: diabetic patients who suffer from peripheral neuropathy may affect their sense of taste and may feel that their saliva is bitter. Feeling more bitter saliva may also have other reasons, it is recommended to consult a doctor in time to clarify the cause, if you need treatment, should be standardized under the guidance of the doctor.