When edema occurs in the fifth month of pregnancy, it is important to first observe and distinguish what is causing it. There are many reasons for edema during pregnancy, because as the fetus grows, the uterus also grows, which can compress the inferior vena cava and lead to obstruction of the return flow and edema. During pregnancy, due to the rapid growth of the fetus, the pregnant woman may suffer from hypoproteinemia and anemia, which may also cause edema and require timely nutrition to relieve the edema. If a pregnant woman has increased blood pressure, it will affect the kidneys, resulting in a decrease in the filtration function of the kidneys and causing edema, which requires timely use of antihypertensive drugs to control blood pressure in order to reduce the symptoms of edema.