Menstrual disorders are common gynecological conditions that manifest as abnormal menstrual cycles or bleeding, or abdominal pain before or during menstruation and systemic symptoms. The cause may be organic or malfunctioning. The symptoms include early menstruation, delayed menstruation, prolonged menstruation, menstrual disorders, and midmenstrual bleeding (also known as intermenstrual bleeding and ovulatory bleeding). Common symptoms: 1. Premature menstruation refers to shortened menstrual cycle, shorter than 21 days, and more than 2 cycles in a row, belonging to ovulatory gonorrhea Basal body temperature biphasic, short follicular phase, only 7-8 days, or luteal phase shorter than 10 days, or body temperature rise of less than 0.5℃. 2. Delayed menstrual period More than 7 days after the wrong menstruation, or even 40 to 50 days a line, and more than two consecutive menstrual cycles. In those with ovulation, the basal body temperature is biphasic, but the follicular phase is long and the high temperature phase is low; in those without ovulation, the basal body temperature is monophasic. 3. Prolonged menstrual cycle with normal menstrual cycle, prolonged menstrual period, more than 7 days or even 2 weeks. If there is inflammation, the pain in the abdomen is usually worse during menstruation, and the leucorrhea is usually abundant, yellow or yellowish-white, thick and tasty. Those with luteal atrophy are also accompanied by heavy menstrual flow; those with prolonged endometrial repair still have a small amount of persistent vaginal bleeding after normal menstrual period. 4.Menstrual disorders There are also irregular menstruation, early or delayed menstruation, and cycles shorter than 21 days or longer than 35 days. 5.Midmenstrual bleeding (also called intermenstrual bleeding, ovulatory bleeding) refers to bleeding that occurs in the middle of two regular and normal menstrual cycles, which is caused by the loss of hormonal support of the endometrium due to a brief drop in estrogen levels.