1, irregular operation of uterine cavity: incomplete infection, premature rupture of membranes during delivery or postpartum placenta, residual uterine cavity of lochia, irregular operation of uterine cavity, lax disinfection of gynecological examination, etc. will all lead to bacterial infection, and if not handled in time, it will lead to upward infection of pathogenic bacteria and cause endometritis.
2, do not pay attention to menstrual hygiene: if women do not pay attention to keep vulva clean during menstruation or perform minor surgery in the uterus, or do not strictly disinfect during vaginal examination during menstruation, it will lead to the invasion of pathogenic bacteria, which will lead to endometritis.
3. Intrauterine lesions: such as long-term uterine bleeding, endometrial polyps, submucosal muscles, etc. The endometrium covering their surfaces is susceptible to infection, causing endometritis.
4. Changes of hormone levels in the body: Older women are prone to senile vaginitis and further develop into endometritis due to the decrease of estrogen in the body, the decrease of acidity in vagina and the decrease of cervical mucus plug.