Postpartum uterine separation refers to the fact that when the patient undergoes pelvic ultrasound examination after delivery, there is a certain amount of malignant fluid or residual blood in the uterine cavity as well as fetal membranes that did not flow out in time, and these tangible components have a certain boundary with the endometrium of the uterine cavity, which can appear as a separation change under ultrasound imaging. There are also some patients who have pelvic inflammatory disease, myometritis, endometritis and other gynecological inflammatory diseases that cause the onset of fluid in the uterine cavity, which can also cause the phenomenon of separation of the uterine cavity after delivery. It is recommended that the patient go to the obstetrics and gynecology department of the local public hospital to further clarify the cause of the disease and treat the disease according to the cause, so as to control the development of the disease as soon as possible to avoid aggravation of the disease, which will have a serious impact on the patient’s health, and some may even have an impact on maternal breastfeeding.