If leg pain occurs every time you get your period, the main reason is that the entire pelvic cavity is in a state of congestion during menstruation, which affects the blood circulation in the lower limbs, and leg pain will occur. It is best to soak your feet in hot water every day when you have your period to promote local blood circulation and improve blood circulation in the lower limbs, which will ease the symptoms of leg pain accordingly. If the foot soak still does not improve the symptoms of leg pain, you can take some oral medication, such as Fenbuterol, to relieve the pain. In addition, it is recommended to have an ultrasound examination after menstruation to find out if there are pelvic tumors.