Any factor that impairs or obstructs the flow of pelvic veins out of the pelvis can result in pelvic venous stasis. Compared to men, the gynecological pelvic circulation is very different in terms of anatomy, circulatory dynamics and mechanics, which is the basis for easy formation of pelvic stasis, thus causing stasis dysmenorrhea. Many diseases can also cause stasis dysmenorrhea, the following diseases are the causes of stasis dysmenorrhea: 1. pelvic inflammatory disease (PID) is a group of infectious diseases of the upper female reproductive tract, mainly including endometritis, salpingitis, salpingitis, salpingitis, salpingitis, salpingitis. salpingitis), tubo-ovarian abscess (TOA) and pelvic peritonitis (peritonitis). Inflammation may be confined to one site or may involve several sites at the same time, with salpingitis and tubo-ovarian abscess being the most common. Pelvic inflammatory disease occurs most often in sexually active, menstruating women, and rarely in premenarche, postmenopausal, or unmarried women. If pelvic inflammatory disease does occur, it is often the spread of inflammation in adjacent organs. If pelvic inflammatory disease is not treated promptly and thoroughly, it can lead to infertility, tubal pregnancy, chronic pelvic pain and recurrent inflammation, which can seriously affect women’s reproductive health and increase the economic burden on families and society. 2.Pelvic stasis syndrome Pelvic stasis syndrome is a unique disease caused by chronic pelvic venous blood outflow, pelvic venous filling and stasis. Its clinical characteristics are “three pains, two more and one less”, i.e. pelvic pain, low back pain, painful intercourse, more menstruation, more leucorrhea, and less positive gynecological examination signs. The severity of the disease was found to be positively correlated with the nature of the pain. The pelvic veins are seen to be thickened, tortuous, varicose or in clusters by open surgery. 3. Menstrual disorders Menstrual disorders, also known as menstrual disorders, are a common gynecological condition that manifests as abnormal menstrual cycles or bleeding, or abdominal pain and systemic symptoms before and during menstruation, and may be caused by organic lesions or functional malfunctions. Many systemic diseases such as blood disorders, hypertension, liver disease, endocrinopathies, miscarriage, ectopic pregnancy, staph, reproductive tract infections, tumors (e.g. ovarian tumors, uterine fibroids) can cause menstrual disorders. According to the medical definition, menstruation is considered normal and regular when it occurs every 21 to 35 days. If it is less or more than this period, such as every 14 or 15 days, or if it is delayed until more than 40 days, then it is not normal. The normal amount of bleeding should be less than 80 ml. The length of the menstrual period often varies from person to person, ranging from 2 to 8 days, and usually ends in an average of 4 or 5 days. Since the first menstruation, you should learn and understand some general hygiene, have a correct understanding of the physiological phenomenon of menstruation, eliminate fear and tension, can prevent primary dysmenorrhea or improve the pain threshold to reduce the degree of pain, pay attention to menstrual and sexual hygiene, to prevent menstruation, during childbirth upstream infection, and actively prevent and treat diseases that may cause retention of menstrual blood. 4.Menorrhagia is defined as excessive menstrual bleeding in several consecutive menstrual cycles, but the intermenstrual interval and bleeding time are regular, without intermenstrual bleeding, post-coital bleeding, or sudden increase in menstrual blood. It is a type of dysfunctional uterine bleeding with ovulation. Clinically, ovulatory dysfunctional uterine bleeding is classified into two categories: heavy menstrual bleeding and intermenstrual bleeding by comparing the bleeding time with the basal body temperature (BBT) curve.