The understanding of Chinese medicine on pregnancy malignant obstruction originated in Han and Sui, developed in Tang, Song and Yuan, and perfected in Ming and Qing dynasties. There is also a relatively rich set of experience in treatment. Modern medicine is not very clear about the mechanism of the disease, most scholars believe that the hyperemesis of pregnancy is closely related to the increase of human chorionic gonadotropin in the blood, in addition to mental and social factors, foreign research also reported that, in addition to the impact of pregnancy-related hormones, gastrointestinal tract peristalsis weakening factors, HG may also be related to Helicobacter pylori infection, female embryo, low pre-pregnancy body mass index and other factors. However, there are a number of factors that contribute to and exacerbate the condition in practice, and increased prevention of these high-risk factors can reduce the incidence and severity of pregnancy-related hyperemesis. These risk factors include the size of the gestational week, the amount of noise, sleep status, appetite and the presence of recent renovations. Specifically, the greater the gestational week, the higher the risk of severe vomiting, and the risk of severe vomiting during the 10 to 12 weeks of pregnancy is much greater than during the 6 to 9 weeks of pregnancy. Pregnant women living in a noisy environment have a higher risk of severe vomiting than those living in an environment without significant noise. Pregnant women with poor sleep, loss of appetite, and coffee consumption have a significantly higher risk of severe vomiting. Pregnant women living in recently renovated houses and passive smokers are also at high risk for pregnancy vomiting. The clinical incidence of vomiting is significantly higher in primigravid women than in menstruating women, and many pregnant women now have precious children, making them mentally fragile and anxious, leading to the onset of vomiting.