What Causes Your Lower Back to Throb the Day Before Your Period Starts?
1. Introduction Lower back pain occurring the day before menstruation starts is primarily caused by a rapid increase in prostaglandins. These are lipid compounds produced in the lining of the uterus that trigger the muscular contractions necessary to shed the endometrial lining. When the uterus contracts strongly, the nerve pathways surrounding the pelvic region can … Read more