There are many factors that contribute to back pain in women, but there are usually four causes. One of them is abnormal IUDs. Abnormal IUDs include IUDs that do not match the uterine cavity, IUDs that are too flexible, and IUDs that are in an abnormal position. For these reasons, if the IUD is embedded in the uterine cavity, it can irritate the uterine wall, which can lead to reflex pain in the woman’s lower back. There are also many other factors that can cause back pain in women, but usually there are several causes. Osteoporosis is a major cause of low back pain in middle-aged and older women, with post-menopausal women being more susceptible to this condition. This is because, after menopause, women’s estrogen levels in the body will drop dramatically, and bone mass will decrease, as will the weight-bearing capacity of the spine. In general, a loss of bone mass of 12% or more can cause bone pain. At this point, women experience low back pain when carrying weight or walking. These patients should choose low-salt and calcium-rich diets, and engage in appropriate outdoor activities, and take calcium and vitamin D supplements if necessary. Maternal factors: 1. Uterus position abnormalities Under normal circumstances, the uterus of adult women is in a forward-tilted, forward-flexed position. However, if the uterus is affected by pelvic inflammatory disease or congenital uterine hypoplasia, the position of the uterus will change. At this time, the ligaments around the uterus will be tugged by the uterus, thus compressing the nerves, so it can lead to traction pain in the woman’s lower back. At present, there is no special clinical treatment for this kind of symptoms. After correcting the prolapse of the uterus and changing the position, the symptoms can be relieved. 2, pregnancy and puerperium strain During pregnancy, as the volume and weight of the fetus grows, the ligaments of the lumbosacral and pelvic joints will relax and the center of gravity of the body will shift forward. At this time, if a pregnant woman does not pay attention to rest, it will easily cause back pain. In addition, excessive bleeding, cold or premature labor during the puerperium can also lead to low back pain. Therefore, women should not do physical labor during pregnancy and puerperium, and should rest in bed as much as possible to avoid excessive physical exertion. Abnormalities of the IUD include the type of IUD not matching the uterine cavity, excessive elasticity of the IUD, and abnormal position of the IUD. For these reasons, if the IUD is embedded in the uterine cavity, it will stimulate the uterine wall, which can lead to reflex pain in the lower back of women. Therefore, if a woman has back pain from wearing the IUD, she should go to the hospital in time to remove or replace the IUD to relieve the symptoms of back pain.