If the vomiting worsens, you should go to the hospital to check the liver function and urine routine to see if it is caused by abnormal liver function or disease factors such as gastritis or poor gastrointestinal function. If the indicators are normal, it is considered to be related to the physical condition of pregnant women, improper diet and hormonal imbalance. Physiological factors: Pregnancy vomiting is a common pregnancy reaction during pregnancy, which is related to the increase of human chorionic gonadotropin, decrease of gastric acid secretion and prolonged gastric emptying time. Due to the different physical conditions of pregnant women, the time and degree of pregnancy reactions are also different. Generally, pregnant women have stronger pregnancy reactions in the first 3 months, which will be relieved or even disappear later. But there are a few pregnant women will continue to exist or even aggravate the phenomenon of vomiting, which may continue until the time of delivery. Dietary factors may aggravate pregnancy vomiting when pregnant women overeat, consume greasy food or eat unhealthy and cold food. You can adjust the diet structure and habits of pregnant women, and eat less and more meals. Third, pathological factors 1, liver function abnormalities: hormonal changes in the body during pregnancy, systemic blood volume increases, the burden of liver operation increases, liver function abnormalities can lead to increased pregnancy vomiting. It can be combined with other examination indicators for treatment; 2, gastrointestinal function diseases: if suffering from gastritis, enteritis and other diseases, gastric acid secretion stimulating the gastrointestinal mucosa will aggravate the reaction of pregnant women; 3, hyperthyroidism: endocrine disorders in the body of hyperthyroidism may aggravate the pregnancy vomiting of pregnant women. If the pregnancy vomiting is more serious, it is best to go to the hospital to avoid electrolyte disorders, which can affect the health of the pregnant woman and the fetus.