Low blood pressure in pregnant women is defined as a diastolic blood pressure of more than 50 mmHg. It is generally not serious if symptoms such as dizziness and palpitations do not occur, but if symptoms such as dizziness and nausea do occur, they are serious. Pregnant women due to the expansion of the circulatory system, blood dilution and other reasons, during pregnancy may lead to lower blood pressure, so that the diastolic blood pressure is slightly lower than the normal value of 60mmHg, is a normal phenomenon, is not serious, and generally do not need to intervene, after delivery can generally return to normal. However, if the blood pressure is lowered due to dehydration caused by pregnancy vomiting, decreased blood cells due to anemia, malnutrition, etc., or if the pregnant woman experiences symptoms such as palpitations and dizziness, it is serious and requires timely medical intervention. During pregnancy, women should take care of rest, relax and avoid tension and anxiety, and should go to the hospital in time for any discomfort, so that the doctor can make a clear diagnosis and cooperate with the doctor in treating the symptoms.