If a woman has back pain, it may be related to the following reasons: 1. It may be caused by muscle fatigue in the back. This condition is common in some women who need to perform heavy physical labor, and sometimes can be seen in some women with large breasts. This type of women due to the front of the body load is relatively large, it will reflexively cause the muscles of the back to remain tense for a long time, and then maintain body balance. This time it will produce back muscle fatigue, and then cause pain. 2, this condition may be due to the back of the fasciitis caused by the back. This is a condition that can be caused by the misalignment of the thoracic spine. This kind of disease is mostly due to the patient to keep sitting and standing low for a long time, or have some bad sitting posture, lying posture, so that the small joints of the thoracic spine between some small misalignment, then may also cause back pain. 4, this situation may be due to osteoporosis caused by such diseases are common in older women, once the onset may also cause pain in the back, pelvis, hip joints, etc..