Inflammatory diseases in gynecology include many, such as vulvitis, vaginitis, cervicitis, endometritis, pelvic inflammatory disease and so on. The most common inflammatory disease that can cause back pain is chronic inflammation of the pelvis. One reason is that inflammation of the pelvis will make the uterus inactive, so the uterus is more backward-flexed and backward-tilted, and once there is stimulation of inflammation, it will cause lumbosacral pain. Another is that due to the chronic inflammation of the pelvis, the exudation of the pelvis increases. For example, under ultrasound examination, it can be found that there is fluid in the pelvis, and this kind of fluid is at its lowest level when standing or sitting, which stimulates the posterior peritoneum and also causes lumbar soreness.