The postpartum dew is usually cleared at 3 weeks (21 days) after delivery. Postpartum dew is the discharge of the healed uterus from the pubic area, although the time it takes for postpartum dew to clear may vary from person to person. In some women, it can be as short as 2 weeks (14 days) and in others, up to 6 weeks (42 days). It is worth noting that the duration of postpartum dew varies depending on the physical condition of the woman. Some women are in good physical condition and their dew lasts for 3 weeks after delivery; some women are in poor physical condition and their dew can last for 6 weeks, which is related to diet and rest. If the nightmare still keeps flowing out for more than 1 month or 42 days after delivery, and the amount of nightmare is not reduced, the nightmare is not clean. In Chinese medicine, it is called qi deficiency, blood stasis and blood heat. In case of qi deficiency, the mother’s blood is not enough before delivery, plus she lost too much blood during delivery and did not take good care of herself after delivery, so she hurt her spleen and qi with stagnant blood. In this case, it is necessary to seek medical advice and take reasonable supplements under the guidance of a doctor.