It refers to sudden dizziness after childbirth, unable to get up and sit down, or fullness in the heart and chest, nausea and vomiting, phlegm rush, anxiety, or even dizziness, unconsciousness, known as “postpartum hemorrhagic dizziness”. Obstetric examination: to find out whether the fetal membranes and placenta are intact, whether the uterus is contracting, whether there is any sign of soft birth canal injury, and to observe the amount of vaginal bleeding. 2.Laboratory examination: blood routine, platelet count, prothrombin time, fibrinogen and other laboratory tests related to coagulation function, which can help clinical diagnosis. 3.Other tests: ultrasound, electrocardiogram, cardiac function test, renal function test, blood pressure measurement, etc. can assist in diagnosis.