The volume of a woman’s menstrual flow varies from person to person and should normally be around 60 ml per period. If the total amount is less than 30ml, it is considered as light menstruation and more than 80ml is considered as heavy menstruation. However, during puberty, women will have more menstrual flow than adults, even if they are healthy. Women over 45 years of age will experience a decrease in menstrual flow. The amount of menstrual flow can be judged by the number of sanitary napkins used each time you menstruate, taking 10 tablets per pack as the standard, if you use more than 3 packs each time and still don’t have enough, and the amount of water absorbed by the sanitary napkin is in a saturated state each time, then it is considered as excessive menstruation. If the number of sanitary napkins used per period is less than one and a half packets, and the color of menstruation is reddish or brownish, and the surface area soaked through the sanitary napkin is very small each time, then it belongs to menstruation.