Almost every woman has experienced or is experiencing menstrual disorders or will experience them in the future. If you accidentally run into a menstrual disorder, your first reaction must be to go to the hospital to see a doctor. It is right to look for a doctor, but have you thought about looking for yourself before you look for a doctor, think about why you have menstrual disorders, and ask yourself how much you know about menstrual disorders? 1. Normal menstruation: ① Menarche: the first menstruation, which usually occurs at the age of 13-14. Due to the improvement of people’s living standard nowadays, especially the consumption of some bad foods, a few women have the beginning at the age of 11, but it is a few and individual. ②Menstrual cycle: usually a cycle of 28-30 days, that is, once a month. ③Menstrual period: normal is 3-7 days, most of them are between 3-5 days. ④Menstrual volume: It is the total amount of menstruation, mostly about 30-80ml, which is usually roughly estimated by the amount of sanitary napkins. Most women have the most volume at this time on the 2nd-3rd day of their period. ⑤Menstrual color: refers to the color of the menstruation, the regular is dark red, the amount of large may also be dark black, the color is usually light red when it is almost clean. (6) Quality of menstruation: It refers to the quality of menstruation. Good quality menstruation is usually thin and moderate, without blood clots, and without odor mixed with blood. (7) Menopause: It refers to the natural cessation of menstruation at a certain age. The age of menopause is usually between 45-55 years old. 2, six types of menstrual disorders Menstrual disorders are too familiar to many women, anyway, menstruation does not come on time or come too much or too little, etc. are regarded as menstrual irregularities. So, from a medical point of view, how is menstrual disorders classified? In general, there are six main categories as follows. The first category is pre-menstrual: it means that your period comes more than 7 days earlier than your previous fixed date, including 7 days, of course. (but only if there are 2 or more such cases in a row) ② The second category is late menstruation: this is just the opposite of premenstruation, which means that menstruation is delayed by 7 days or more than your previous fixed days before it comes. It is very powerful to have a period only once in 3-5 months. ③The third category is irregular menstrual sequence: this can be interpreted as a mixture of the previous two categories, where menstruation comes early or is delayed. ④The fourth category is prolonged menstruation: this is the duration of menstruation, if it lasts more than 7 days or less than 15 days, it is called prolonged menstruation. If the period lasts for more than 15 days and continues, it should be distinguished from menorrhagia and intermenstrual bleeding. ⑤ The fifth category is excessive menstruation: the normal menstrual volume is usually between 30-80ml, if your menstrual volume is more than 1 times than the usual volume, for example, you used to have 30ml, but now it is 70ml; or more than 80ml, it is called excessive menstruation. (6) The sixth category is menorrhagia: it means that the amount of menstruation is less than half of your usual amount, or less than 30ml, or even a drop that is clean. These six above are the more common cases of menstrual disorders among lesbians, and they are all unified in medical science as menstrual disorders. They can be single or mixed with each other. In addition, there are special cases of menstrual irregularities, such as intermenstrual bleeding, and menorrhagia, which will be separately covered. The factors of the formation of menstrual irregularities and their treatment and prevention will continue to be popularized in the next issue of Science.