Bitter mouth for more reasons, specifically the following: 1, oral diseases: such as patients with chronic gingivitis, can lead to chronic bleeding gums, causing bacterial infection, the mouth can emit a bitter taste; 2, digestive diseases: such as gastroesophageal reflux disease, patients with intestinal reflux of acid into the oral cavity, resulting in oral odor, which can be manifested as a bitter taste of the mouth; 3, sensory nerve dysregulation in the oral cavity: for the vegetative nerve dysfunction of the Direct performance, may be due to stress, fatigue, family emergencies stimulation and other factors. It is recommended that patients with bitter mouth should go to the hospital in time, after a clear diagnosis of the corresponding treatment.