Hello, Welcome to HealthcareMagic. This pain during menstrual cycles is called dysmenorrhea. It can be of two types; primary and secondary. Primary dysmenorrhea is seen within 2 years of onset of menstruation and stays for 1 to 2 days of each cycle. The secondary dysmenorrhea is due to pelvic inflammatory disease, fibroids, endometriosis (abnormality of lining of uterus), pelvic tumors, and intra uterine device (like copper-T) etc. You should consult gynecologist for internal examination and other test needed to detect it s cause. Till that time try dietary modifications (to increase protein and decrease sugar and caffeine intake),vitamin supplements, regular exercise, keeping a heating pad across the abdomen or taking a hot bath or shower. Hope it helps you. Regards.