Pregnant women often have symptoms of vomiting during pregnancy, mainly due to the increased secretion of chorionic gonadotropin in the body during pregnancy, the secretion of gastric acid decreases, and the activity of digestive enzymes decreases accordingly, and there will be vomiting of yellow water. In addition, if the pregnant woman vomits a lot, when there is not much in the stomach, it is easy to vomit out the bile, the symptoms of vomiting yellow water, bitter water. With the increase of the stomach, the pressure on the gastrointestinal tract, so that the gastrointestinal tract peristalsis slows down, can also lead to acid reflux, vomiting yellow water and other symptoms. Normally, you can exercise appropriately, eat small meals, and eat a light, easily digestible diet.