Most of them have bloody nightmare first after delivery. The bloody nightmare will be completely clean in about 7 days, and then there will be plasma nightmare, which may be yellow. There is no need to be nervous, as the plasma nightmare will last for about 15 days and will turn white again. During the period of vaginal nightmare, you must strengthen the local care of the vulva, scrub the vulva with iodine 1-2 times a day and change the sanitary napkin and underwear regularly to keep the area clean and reduce the chance of infection. In addition, if there is yellow nightmare accompanied by lower abdominal pain, it may be caused by pelvic inflammatory disease or endometrial inflammation, so it is recommended to go to the hospital in time.