Menstruation lasting for only 2 days is an abnormal phenomenon, and you should consult the hospital in time to clarify the cause. Normal women’s menstrual cycle is around 28 days, and the menstrual cycle lasts for 3-5 days, if it is less than 3 days, it belongs to short period. There are more reasons for short periods, which may be related to emotions, such as getting angry before or after menstruation, which can easily shorten the menstrual period and reduce the amount of menstruation; getting cold or eating cold food during menstruation can also easily shorten the menstrual period; staying up late before or after menstruation, irregular life and work schedules, and high stress, etc., all of which will cause changes in the menstrual period as well as in the amount of menstruation. In addition, it may also be related to menstrual disorders caused by endocrine disorders, as well as gynecological diseases, such as uterine fibroids. If shortening of menstrual period occurs once in a while without any special discomfort, it can be observed for a while; if shortening of menstrual period occurs for several months in a row, hormone level examination should be carried out to understand the function of the ovaries, and active diagnosis and treatment should be carried out to prevent the decline of ovarian function.