Yellow water in the morning may be related to bile reflux gastritis, gallbladder disease, acute gastroenteritis or peptic ulcer and other diseases. 1. Bile Reflux Gastritis (BRG): If the symptom of vomiting yellow water in the morning occurs frequently, it may be related to bile reflux gastritis. The patient will often have epigastric pain, nausea, vomiting, abdominal distension, because there is bile in the vomit, so it will vomit yellow water. 2. gallbladder disease: gallbladder stones with cholecystitis patients, if caused by gallbladder mucosal edema, thickening and fibrous tissue proliferation, will affect the gallbladder concentration and excretion of bile function, may lead to bile reflux to the stomach, the phenomenon of vomiting yellow water in the morning. 3. Acute gastroenteritis: If severe vomiting is accompanied by fever, diarrhea, loss of appetite and other symptoms, you may be suffering from acute gastroenteritis. After frequent vomiting may lead to stomach contents after vomiting continue to vomit bile, the symptoms of yellow water in the morning. 4. Peptic ulcer: may cause gastric emptying ability to weaken, gastric juice can not quickly into the intestinal tract, bile, gastric acid in the stomach for a long time stagnation, it is likely to occur in the morning vomiting yellow water. There are many other reasons that cause patients to vomit yellow water in the morning, it is recommended to go to the regular hospital in a timely manner, to clarify the cause of the disease, under the guidance of the doctor for targeted treatment.