Before a simple unexplained premature rupture of membranes, a pregnant woman may have vaginal fluid flow, which is usually not accompanied by other symptoms. However, if it is because of amniotic cavity or reproductive system infection, the patient will often have symptoms of accelerated maternal and fetal heart rate and fever, and premature rupture of membranes will usually last for a period of time, during which the patient will have vaginal fluid, at this time, the patient should remain in the prone position, elevate the buttocks, and immediately send the pregnant woman to the hospital for consultation.1. Vaginal fluid: most pregnant women will have vaginal fluid before premature rupture of membranes, that is, they will Most of the flow is clear liquid, but it can be mixed with fetal fat and feces, usually without other symptoms. If the vaginal fluid is bloody or yellow-green, it is abnormal and may be caused by infection. 2. Accelerated heart rate of mother and fetus: When occult amniotic cavity infection occurs, there will be accelerated heart rate of mother and fetus, increased white blood cell count and pressure pain in the uterus, which means that the fetal membrane is connected to the outside world causing infection, and timely medical treatment should be sought. 3. In the case of amniotic fluid infection, the vaginal fluid will have a distinct odor, and the pregnant woman will have fever, rapid heart rate and uterine pain, and the examination results will show increased white blood cell count, elevated C-reactive protein and calcitoninogen. In addition, premature rupture of membranes at less than 24 weeks of gestation is mostly advocated for induction of labor. At 28-35 weeks of gestation, if the fetal lung is immature and there are no symptoms of infection and fetal distress, the fetal lung can be promoted to maturity first and delivery can be performed if necessary. Pregnant women can take appropriate precautions to prevent premature rupture of membranes, for example, vaginal microbiological testing should be performed during pregnancy to reduce inflammation of fetal membranes caused by upward movement of vaginal microorganisms. It is also important to enhance perinatal hygiene, and sexual intercourse should be prohibited in late pregnancy to avoid sudden increase in abdominal pressure. Paying attention to nutritional balance and taking appropriate vitamin and trace element supplements can help reduce the incidence of premature rupture of membranes.