Postpartum dew occurs after childbirth and clears up about three weeks after delivery, which is about 21 days after delivery. However, this is not absolute, as it varies with each individual’s body type and postpartum condition. In some women, the milk is cleared two weeks after delivery, and in some women it can take up to six weeks. The postpartum dew will change over time, mainly from red to white in color. The specific disappearance of postpartum dew is as follows: first, bloody dew, usually bright red in color on the 3rd-4th day after delivery, with a lot of blood and sometimes small blood clots. Secondly, plasma nightmare, which contains more plasma and lasts for 10 days, with less blood and a lot of necrotic meconium. Thirdly, white nightmare, which lasts for about three weeks and then slowly clears up. It is characterized by thick, white color and contains a lot of epidermal cells, white blood cells, bacteria, etc.