A very high diastolic blood pressure in mid-pregnancy may be caused by an increase in the effective circulating blood volume of the pregnant woman and endocrine disorders. It can be relieved by resting, adjusting diet, maintaining a good mood, and using medication. With the increase of pregnancy weeks and the growth and development of the fetus, the effective circulating blood volume of pregnant women will increase, so will the blood volume of the heart, which will lead to an increase in the preload of the heart, i.e., diastolic blood pressure is elevated. At this time, pregnant women can control the diastolic blood pressure by resting on the left side and minimizing sodium intake. If pregnant women do not rest well during pregnancy, or have large emotional fluctuations, it may lead to endocrine disruption, which may result in high diastolic blood pressure in mid-pregnancy. At this time, pregnant women should pay attention to adequate sleep, maintain a good mood and other methods to control diastolic blood pressure. If the diastolic blood pressure in mid-pregnancy has been particularly high, it is necessary to consult a doctor in time, and under the guidance of the doctor to improve the examination, such as checking the renal function, urinalysis, etc., in order to address the cause of the cause of the disease, take medication or intravenous drip drugs to reduce blood pressure. If a pregnant woman has a high diastolic blood pressure in mid-pregnancy, there may be other reasons, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor, improve the relevant examination, to clarify the cause of the disease, symptomatic treatment.