According to the definition of menstrual disorder, first of all, please evaluate whether your menstruation is normal or not. Any abnormality in menstrual cycle, duration and menstrual volume is considered as menstrual disorder. 1.Normal menstrual cycle: From the first day of bleeding to the first day of the next bleeding, the interval between the two is the length of the menstrual cycle, usually 21-35 days, average 28 days; Normal menstrual duration (period): usually 2-8 days, average 4-6 days; Normal menstrual volume: 20-60ml, more than 80ml is excessive menstruation. (2) Classification of menstrual disorders: (1) Amenorrhea: primary amenorrhea: age over 13, secondary sexual characteristics have not developed, or age over 15, secondary sexual characteristics have developed, and menstruation is still coming; secondary amenorrhea: menstruation stops for 6 months after normal menstruation is established or stops for more than 3 cycles according to its own menstrual cycle. (2) Menstrual cycle disorder (3) Prolonged menstrual period (4) Excessive or excessive menstrual flow (5) Periovulatory bleeding: bleeding during two menstrual periods 3. Consultation time and precautions: (1) Patients with prolonged menstruation should be consulted promptly if their periods exceed 7 days (2) Patients with amenorrhea are generally recommended to be consulted during amenorrhea or when menstruation is overdue (3) Periovulatory bleeding: it is generally recommended to be consulted during the bleeding phase (4) (5) Menstrual cycle disorders may be seen at any time (5) Excessive or excessive menstrual flow: it is recommended to see the doctor on the 2nd-3rd day of menstruation, and depending on the condition, it may be necessary to see the doctor again on the 3rd day of clean menstruation