Headache is one of many symptoms associated with menstrual phase. Three groups of college students (25 naturally menstruating women, 26 women using oral contraceptives, and 27 men) kept a daily record of each occurrence of headache for eight weeks. The rating scale data was analyzed to test for effects of group and menstrual phase. Naturally menstruating women reported more headaches than women using oral contraceptives, and in addition, women in both groups experienced variability across menstrual phase in reported headaches. Headache pain was found to rise premenstrually reaching a peak during the menstrual phase.