Edema in late pregnancy generally refers to the condition of edema in late pregnancy. Edema in late pregnancy is generally a normal physiological phenomenon, and the patient can be relieved by rest, low-salt diet, wearing elastic stockings and elevating the legs. However, note that if edema is caused by high blood pressure, kidney disease, liver disease, etc. during pregnancy, it is necessary to go to the hospital in time for treatment. Edema in late pregnancy is caused by endocrine changes in pregnant women, physiological hypoproteinemia, resulting in water and salt retention in body tissues. It is generally a normal physiological phenomenon. Patients can relieve edema through adequate rest, low-salt diet, wearing elastic stockings, elevating legs, appropriate exercise, and other methods. Edema in late pregnancy may also be caused by diseases, which may be related to pregnancy hypertension, heart disease, diabetic nephritis, hypoproteinemia and other diseases. If the edema of pregnant women can not be relieved on their own or combined with other diseases, it is recommended that the patient go to the hospital in time to improve the relevant examination to exclude the cause.