Pregnancy vomiting mostly belongs to early pregnancy reaction, which is a normal performance caused by the change of hormone level in the body at the early stage of pregnancy, resulting in gastrointestinal dysfunction, but it may also be an abnormal symptom caused by gastrointestinal diseases, which needs to be treated symptomatically after perfect examination to clarify the cause. 1. Early pregnancy reaction: pregnancy vomiting is a common symptom of early pregnancy reaction, and due to the different physical conditions of individuals, the early and late appearance of early pregnancy reaction, its intensity and duration also vary from person to person. The degree and duration of early pregnancy reaction varies from person to person. Generally, in the third month of pregnancy, the symptoms of pregnancy vomiting will disappear slowly, and can also be reduced by adjusting dietary habits and lifestyle, such as a light diet, eating less and more meals, reducing the intake of greasy, cold, rough, spicy and stimulating food, avoiding irritating smells such as fumes and paints, ensuring sufficient sleep, and also by taking a walk, listening to music and other ways to divert attention and reduce vomiting. In addition, the use of vitamin B or metoclopramide and other drugs under the guidance of a doctor can also effectively relieve the symptoms of pregnancy vomiting; 2, gastrointestinal diseases: such as gastritis, gastroenteritis, intestinal obstruction and other diseases, easily caused by indigestion leading to digestive system disorders, thus causing nausea, vomiting, abdominal discomfort and other symptoms, need to actively improve the gastroscopy, X-ray and other tests for a clear diagnosis, take targeted measures to deal with. In addition, acute and chronic hepatitis, cholecystitis, pancreatitis, cholelithiasis and other diseases can also cause vomiting symptoms, which should be diagnosed differently and treated actively under the guidance of a doctor to avoid adverse effects on the pregnant woman and her fetus.