It usually takes 4-6 weeks for the postpartum dew to clear. The 4-6 weeks are divided into several stages. Firstly, the bloody nightmare, which is usually 3-7 days after delivery, is called bloody nightmare because it is bright red. Secondly, the plasma nightmare is usually light red and will reach the third stage in about 10 days. Thirdly, white nightmare is called white nightmare because there are a lot of white blood cells in it, so it lasts for about 2 weeks. The average discharge time of nightmare for women is 2-4 weeks, but some women may need 2 months to get rid of it. After the baby eats the milk and the reflex contraction of the uterus caused by the stimulation of the nipple, the uterine cavity will reflexively appear vaginal discharge, which is conducive to the recovery of the uterus.