Bad edema in 37 weeks of pregnancy may be a normal phenomenon, and it may also be related to disease factors, such as high blood pressure, kidney disease, and so on. 37 weeks belongs to the late stage of pregnancy, due to the larger fetus, the uterus will cause pressure on the inferior vena cava, so that the lower limbs reflux obstacles, it is easy to appear edema, in sedentary and standing, edema symptoms aggravated, after bed rest, edema can be reduced, is a normal phenomenon. In late pregnancy, some pregnant women may develop gestational hypertension, when the lesion is more serious, severe edema will occur, may also be accompanied by proteinuria, dizziness, headache and other symptoms. When kidney disease exists in pregnant women in late pregnancy, such as glomerulonephritis, it can also cause edema, which is manifested as lower limb edema as well as eyelid swelling. Edema in 37 weeks of pregnancy, and the presence of other abnormal manifestations, should be vigilant for disease factors, it is recommended to seek medical examination and treatment to avoid adverse effects.