Menorrhagia is generally defined as the absence of menstruation when it is due. For women of childbearing age, if they are sexually active, with or without contraception, they should consider whether they are pregnant if they have not had a period for more than the previous period. However, menstruation that is early or pushed back within a week is generally normal and not pathological. Menorrhagia can also refer to amenorrhea, which clinically is defined as the cessation of menstruation for six months without a period. Menorrhagia can be divided into primary amenorrhea and secondary amenorrhea; menopause can also refer to menopause, when a woman has not had a period for 12 consecutive months between the ages of 45 and 55. In addition, menopause can also be physiological, which is a condition that does not require treatment, such as pregnancy, breastfeeding or after menopause. In conclusion, menorrhagia is the absence of menstruation beyond the normal menstrual period. Physiological menorrhagia should be ruled out, and if pathological menorrhagia is considered, the cause of menorrhagia should be identified and then treated. Stress, environment or emotions may also cause delayed menstruation.