In most cases, edema will appear around 6 months of pregnancy, but the time when edema appears will differ for each person’s physique and the degree of development of the fetus. During pregnancy, edema is easily caused by the gradually increasing uterus, which compresses the inferior vena cava, causing poor reflux in the lower extremities, so when you sleep at night, you can elevate the lower extremities, which can promote local blood circulation and effectively relieve the swelling of the lower extremities. In terms of diet, you can eat more winter melon, watermelon and mung bean soup, all of which can play a good role in promoting water and reducing swelling, and can also effectively relieve edema during pregnancy. In short, most of the edema during pregnancy is a normal phenomenon, do not worry excessively, if the edema during pregnancy, accompanied by increased blood pressure, protein urine, it is an abnormal situation, to go to the hospital in time to avoid delaying the disease, endangering the pregnant woman and the fetus.