Posterior uterus is a variation of the anatomical position of the uterus, and the common causes include: 1. problems in the congenital development of the uterus, resulting in the ligaments that fix the position of the uterus relaxing, causing the position of the uterus to tilt backward. 2. chronic gynecological inflammatory diseases, due to inflammatory stimulation, resulting in tissue lesions around the uterus, causing adhesions between the uterus, and the rectum behind the uterus, and causing the position of the uterus to tilt backward. 3, After multiple abortions, or after multiple full-term deliveries or induced labor, patients do not rest well and perform physical labor too early, which can easily lead to the posterior position of the uterus. Mild retroversion of the uterus has no obvious clinical symptoms and requires no special treatment. Severe retroversion of the uterus may cause obvious symptoms of lumbago, and appropriate methods can be taken to reset it.