Pregnancy vomiting and vomiting bitter water may be an early pregnancy reaction, but also may be caused by bile reflux esophagitis, cholecystitis and other diseases. 1. Early pregnancy reaction: pregnant women vomit bitter water, which is due to the reaction of early pregnancy, and in more serious cases, there will be severe vomiting of pregnancy. This is because when pregnant, the gastrointestinal tract will be stimulated by chorionic hormone, resulting in the peristalsis of the gastrointestinal tract becomes slow, and once stimulated, nausea will occur. Poor diet can spit out gastric juices and bile. 2. Bile reflux esophagitis: this is because stomach acid and bile flow backward from the cardia sphincter and are too aggressive in the upper esophagus, which will make the patient vomit. 3. Cholecystitis: Because of the insufficiency of the pyloric sphincter, the contents of the intestines will flow backward into the stomach cavity and then back into the mouth, which contains stomach acid and bile, and thus will lead to vomiting bitter water. If the patient’s symptoms of pregnancy vomiting and spitting out bitter water are serious and persist without relief, he should pay more attention to it and seek medical treatment in time.