Dew is usually drained in about 4 to 6 weeks after giving birth. When the uterus sheds its membranes after delivery, tissues containing blood and necrotic membranes are discharged through the vagina, which is known as bad dew. The discharge has a bloody but odorless taste and lasts for 4 to 6 weeks. Because of its color, content and time are different, bad dew is divided into: 1. Bloody discharge: bright red color, large amount, sometimes with small blood clots. Microscopically, there are a lot of red blood cells, necrotic meconium and a small amount of fetal membranes. Hemorrhagic malignant discharge lasts for 3 to 4 days. Bleeding gradually decreases and plasma increases, transforming into plasma malodor. 2. Plasma Dew: pale red in color. Plasma leakage lasts for about 10 days, with a gradual decrease in plasma and an increase in leukocytes, changing into white leakage. It takes about 4-6 weeks for the whole process of discharge, if there is still discharge after 6 weeks, or if the discharge is accompanied by odor, fever and other symptoms, it is recommended to go to the hospital in time.