Why does my daughter’s behavior worsen just before and during menstruation?

A common effect of a concussion is an injury to the autonomic nervous system (ANS) that results in a decreased ability to properly pressurize the flow of blood through the brain and is referred to as cerebral hypoperfusion. Along with the ANS, progesterone levels in women also contribute to the pressurization and proper blood flow within the brain. nnJust before menstruation, progesterone levels begin declining, and if the ANS is healthy and free of injury, it can compensate for the declining pressure from less circulating progesterone. But if the ANS is injured and unable to fully compensate for the declining brain blood pressure, the lower than normal brain pressure can trigger more anxiety, aggression, hyperactivity, and worsening focus.n