During the period of bad dew, women can usually use special lotion or warm water to rinse the vulva as a way to achieve the purpose of cleansing. Bad dew usually refers to the post-partum period when the uterine metaphysis is shed, containing blood, necrotic metaphysis and other tissues discharged through the vagina, and often has the symptom of a large bloody smell and abnormal color. Dew cleaning can use special lotion or warm water for vulvar rinsing, cleaning order from front to back, to avoid bacteria into the vagina or urethra, the vulvar area of the discharges or blood crusts clean, and finally wiped clean, to prevent the growth of bacteria. Women are advised to pay attention to the environmental changes during the period of bad dew, to avoid cold, if the symptoms are more serious or there are other conditions exist, should go to the hospital in time for a detailed examination of the signs and symptoms, clear the cause of the disease, and then follow the doctor’s instructions to deal with the treatment.