There are many pregnant mothers inquiring about hypertension, a somewhat cold killer that can raise blood pressure after pregnancy even in women who did not have hypertension before pregnancy, although gestational hypertension usually appears after the fifth month of pregnancy; of course, there are some mothers who experience elevated blood pressure in the early stages of pregnancy, for different reasons: some may be an organic reaction caused by pregnancy, while some may be pathological. Gestational hypertension, or hypertension for short, is a killer that has become a mastermind of increased maternal and perinatal morbidity and mortality. In general, hypertension is divided into five categories and each has its own characteristics, so it seems that this killer is quite diverse in character. Classification Diagnostic criteria/characteristics Gestational hypertension First elevation of blood pressure during pregnancy, systolic blood pressure ≥ 140 mmHg or diastolic blood pressure ≥ 90 mmHg; negative proteinuria Return to normal blood pressure 12 weeks after delivery; postpartum confirmation May be accompanied by epigastric discomfort or thrombocytopenia; pre-eclampsia Elevated blood pressure ≥ 140/90 mmHg after 20 weeks of pregnancy; 24-hour urine protein quantification ≥ 0.3 g or random urine protein (+); convulsions before or after delivery in patients with eclampsia that cannot be explained by other causes; chronic hypertension complicated by preeclampsia Hypertensive women with negative proteinuria before 20 weeks of gestation but with urine protein quantification ≥0.3g/24h after 20 weeks of gestation; or sudden increase in urine protein, further increase in blood pressure or thrombocytopenia (<100×109/L) before 20 weeks of gestation. Combined chronic hypertension in pregnancy Blood pressure ≥ 140/90 mmHg before pregnancy or before 20 weeks of gestation; Hypertensive disorders first diagnosed after 20 weeks of gestation lasting until after 12 weeks postpartum; 2. Causes of hyperemesis: As just mentioned about the pathogenesis of hyperemesis is still unclear, but the medical field has never stopped research and pursuit about this killer. There are more studies abroad about the pathogenesis of pre-eclampsia-eclampsia, which is still an international wanted person, but there is also no single factor that can explain this disease, and it is mostly thought to be the interaction of multiple factors such as maternal, fetal, and placental. Trophoblast infiltration abnormalities: The principle is probably that the trophoblast cells do not settle properly, causing remodeling of blood vessels and arteries, which leads to a relative decrease in placental perfusion and hypoxia. Dysregulation of immune balance: In layman's terms, a decrease in immune function provides an opportunity for the growth of bad cells, which in turn leads to a decrease in certain bodily functions, resulting in an increase in blood pressure. Oxidative stress: Local oxidative reactions occur in the hypoxic placenta and are transferred to the maternal systemic circulatory system, producing free radicals and peroxides that further damage the blood vessels, while the patient's antioxidant function decreases, and then, combined with the chronic catalysis of time, becomes ill. Genetic factors: According to studies, mothers with pre-eclampsia have a 20-40% chance of passing it on to their daughters, and 11-37% of pre-eclampsia patients are sisters; in twin births, the consistency of having pre-eclampsia is 60%. Nutritional factors: According to research, lack of zinc, calcium and magnesium during pregnancy are more likely to be sick. 3, how to prevent hyperemesis So how to deal with such a terrible killer? First of all, we should do a good consultation and have a basic understanding of hyperemesis gravidarum, for example, the height and weight of this killer, and whether it is handsome or not and so on. Secondly, if you have the first symptoms, you must do a good examination and monitoring, and raise the attention to your own blood pressure, weight, urine protein, etc. Then again, do a good job of general treatment, that is, try to rest on the left side, so as to reduce the pressure of the uterus on the abdominal aorta and inferior vena cava, left side lying for 24 hours can reduce the diastolic pressure by 10 mmHg. Finally, relax, eat well, supplement multivitamins, of course, the family's care for pregnant mothers can also make the killer of hyperemesis dared not come close to oh.