Generally, the lower body will become looser to different degrees after giving birth to a child, and pelvic floor muscle exercises can be carried out under the guidance of the doctor to promote recovery. When giving birth to a baby, the vaginal cavity is enlarged due to the delivery of the fetus through the vagina, the vaginal mucosa and the surrounding tissues are edematous, and the mucosal folds are overextended and reduced or even disappeared, which results in the relaxation of the vaginal walls to different degrees. Generally, the vaginal folds will be restored 3 weeks after delivery, but still can not be restored to the state of non-pregnancy. After giving birth to a child, you should pay attention to proper rest, eat more food rich in protein and calories, keep the vulva clean and dry, and change underwear frequently. You can also do postnatal rehabilitation exercises under the guidance of your doctor in a gradual manner, such as Kegel exercises, pelvic floor muscle exercises, anal lifting exercises, etc., which are conducive to the recovery of the pelvic floor.