Most pregnant women do not have significant reactions when they are less than one month pregnant. Early pregnancy reactions such as nausea, vomiting, loss of appetite and full strength sleepiness will not appear until 6 weeks to 3 months of pregnancy. According to statistics, about 70%-80% of pregnant women experience early pregnancy reactions, which range from mild and moderate nausea and vomiting to pathological severe pregnancy vomiting, but the pathogenesis of which is still unclear and can only be treated symptomatically at present. However, pregnancy vomiting does not occur in all people and is affected by the body type and estrogen in the body. Generally speaking, most women who experience pregnancy sickness experience it more than 6 weeks after pregnancy, especially in the morning, a few hours after waking up. In milder cases, the symptoms are only a loss of appetite and occasional nausea or vomiting, while in more severe cases, vomiting can be severe and can occur at any time of the day due to the acute sense of smell. The general early pregnancy reaction is not harmful to the fetus, but it can seriously affect the quality of life of pregnant women, increase the economic burden, and cause certain impact on the family and society. For patients with pathological severe pregnancy vomiting, failure to receive timely and effective treatment will have serious effects on the mother and fetus, and its treatment can be divided into non-pharmacological, pharmacological and nutritional support.