Bitter eating may be caused by poor gastrointestinal function, gallbladder disease, oral disease and other factors. 1. Poor gastrointestinal function: If eating is bitter, it may be due to poor gastrointestinal function, poor peristalsis, resulting in bile reflux phenomenon, which will cause bitter mouth, heartburn and other uncomfortable symptoms. 2. Gallbladder disease: If the patient suffers from gallbladder disease, it may lead to abnormal bile secretion, causing bile stagnation, and the discharge is not smooth, resulting in bitter eating symptoms. 3. Oral diseases: If the patient does not pay attention to oral hygiene, or improper diet leads to dental caries, oral ulcers, periodontitis and other diseases, it can also cause bitter mouth problems. In addition, if the sleep time is not enough, mental stress, will also lead to a certain degree of nerve dysfunction, the symptoms of bitter mouth. When there is a situation of eating bitter food, it is recommended to consult a doctor in time so as not to delay the condition.