The menstrual cycle is about 21-35 days, with great individual differences. The formation of the menstrual cycle depends on the hormonal changes in the body, mainly the fluctuating changes of estrogen and progesterone, so menstrual disorders may occur if the hormones in the body change. It is important to avoid overworking and stress to prevent menstrual disorders. The normal duration of menstruation is 3-5 days, and the normal volume of menstruation is usually 30-50ml, but if it exceeds 80ml, you should consider excessive menstruation. Avoid eating too much cold food before and after menstruation and during menstruation to prevent changes in menstrual cycle and menstrual discomfort or to aggravate menstrual discomfort, which may also lead to increased menstrual volume, and avoid sexual intercourse.