Hypertension in late pregnancy is gestational hypertension. Hypertensive disorders of pregnancy are caused by insufficient recasting of small uterine spiral arteries and inflammatory immune over-activation. 1. Insufficient recasting of small uterine spiral arteries: causes shallow placenta attachment, increased vascular resistance, and decreased placental perfusion, thus triggering the development of hypertension in late pregnancy. 2. Inflammatory immune over-activation: there is over-activation of inflammatory immune response both locally and systemically on the surface of the mother and fetus, which reduces the immune tolerance of the mother to the embryo, thus leading to the emergence of hypertension in late pregnancy. Hypertension in late pregnancy can also be caused by vascular endothelial cell damage, vasospasm; genetic factors; nutritional deficiencies such as hypoproteinemia, calcium, magnesium, and zinc deficiencies, and many other conditions. If the patient has high blood pressure in pregnancy, it is recommended to consult a doctor in time, under the guidance of the doctor, improve the relevant examination to determine the type of disease, so as to timely treat the symptoms.