Severe eclampsia is one of the more serious types of hypertensive disorders of pregnancy. Since it is one of the types of hypertensive disorders in pregnancy, the main manifestation is an increase in blood pressure. In severe eclampsia, the blood pressure is usually ≥ 160 mmHg systolic or 110 mmHg diastolic, and should be measured while resting in bed. If both measurements are taken at least 4 hours apart, consider severe preeclampsia. In addition to blood pressure, some pregnant mothers with severe preeclampsia may experience persistent pain in the right upper abdomen or epigastrium. This pain cannot be explained by other diseases, and the pregnant mother has significant abnormalities in liver function, which is also a sign of preeclampsia. With the impairment of renal function, a large amount of albumin will be excreted in the urine, and edema of both lower limbs will occur. In addition, some mothers may develop central nervous system abnormalities or visual disturbances, such as unclear vision, headaches or even emotional abnormalities, which are all signs of severe pre-eclampsia.