Half a month after a cesarean section, the color of the discharge is white or yellowish. Normally after a cesarean section with the uterine metaphysis after delivery contains blood, necrotic metaphysis and other tissues discharged through the vagina, known as the bad dew. The discharge usually lasts 4-6 weeks and varies in color and content over time. Generally divided into three stages, 1-2 weeks postpartum to the blood of bad dew mainly, because of the uterus placenta peeling surface bleeding caused by a large number of red blood cells; 2-3 weeks postpartum to the plasma of bad dew mainly, containing a lot of plasma, reddish color; 3 weeks postpartum to the white of the bad dew mainly, is a large number of white cells mainly, lasts for about 3 weeks clean. Women need to pay attention to personal hygiene after cesarean section, keep the vulva clean, eat diversified, rich in nutrients, pay attention to warmth, 42 days prohibit coitus. If there is an increase in the amount of discharge or accompanied by odor or pain in the lower abdomen, it is necessary to go to the hospital in time.