The yellow and bitter water vomited in the morning may be bile or gastric juice, mostly caused by digestive tract diseases, although it may be related to gastric cancer, but it is rare and needs specific analysis. Patients vomiting yellow and bitter water often consider digestive system diseases, which are commonly caused by acute gastritis, gallbladder stones, pyloric obstruction and other diseases. Patients are generally advised to go to gastroenterology outpatient clinics of hospitals for examination and active treatment based on examination results and diagnosis of accompanying symptoms. In addition, patients with gastric cancer usually have symptoms such as nausea, vomiting and black stool only when the tumor affects the function of gastrointestinal tract, and vomiting yellow water and bitter water is relatively rare, but due to the difference of patients’ physique or the wide scope of tumor invasion, the symptoms of vomiting yellow water and bitter water may also appear, which cannot be generalized. In addition to active treatment, patients should pay attention to regular diet, regular and quantitative meals, do not over-starve, and do not overeat.