Pelvic inflammatory disease is a common gynecological inflammatory disease, divided into acute pelvic inflammatory disease and chronic pelvic inflammatory disease. There are several major routes of infection for pelvic inflammatory disease: First, pathogens can be produced through the vulva, vagina, or dysbiosis of the parasitic flora in the vagina, which can lead to upstream infection along the cervical mucosa and endometrium, resulting in the appearance of pelvic inflammatory disease. Second, pathogens can also enter the pelvic cavity through the lymphatic vessels and become infected. Third, they can infect the internal genitalia through the blood circulation system. Fourth, infections of other organs of the abdominal cavity can spread directly to the genitalia. So in order to prevent the occurrence of pelvic inflammatory disease, you should ensure vulva hygiene, intercourse hygiene, no intercourse when there is vaginal inflammation, active prevention of infection after the operation of the uterine cavity, pay attention to exercise, ensure balanced nutrition, improve the body’s immunity, the emergence of acute pelvic inflammatory disease needs to be actively treated, so as not to prolong the occurrence of chronic pelvic inflammatory disease.