Posterior vaginal vault tenderness is commonly caused by chronic pelvic inflammatory disease, miscarriage or rupture of tubal pregnancy. The pathological reason is: when chronic inflammation or tubal pregnancy miscarriage or rupture of fluid accumulation in the posterior vault area, can cause surrounding inflammatory reaction, when the gynecological triad, can appear vaginal posterior vault tenderness. Preventive measures: 1, less alcohol: women who drink for a long time, or suddenly drink a lot of alcohol, then it will cause the tubal lumen is very easy to narrow the situation, and the internal cilia will also have a decline in function, the fallopian tube wall can not be normal peristalsis, so the fertilized egg can not be successfully transmitted to the uterus, so it will cause the occurrence of female tubal pregnancy. 2, non-smoking: women who smoke are 2-4 times more likely to suffer from ectopic pregnancy than normal women because cigarettes contain nicotine, which can cause changes in the movement of women’s fallopian tube cilia, so that the immune system of women’s bodies will be reduced, and the pelvic cavity and other organs of women will be prone to infection. The woman’s pelvis and other organs are also susceptible to infection. 3. Experts suggest that women who are preparing for pregnancy should take advantage of the time to ensure that the inflammation is really healed before considering conception, which can effectively help women avoid ectopic pregnancy.