The normal menstruation time should not exceed 7 days. 10 days of menstruation is a prolonged period, and the reason for prolonged periods is related to excessive endometrial hyperplasia, and may also be related to poor uterine contraction. You can adjust it with medication. If it is endometrial hyperplasia, you can take oral progesterone treatment, oral progesterone or dydrogesterone to promote secretory changes in the endometrium, and then the endometrium will fall off naturally after stopping the medication, the bleeding time is about 3 days, but the bleeding volume will be more after taking progesterone and stopping the medication, usually not more than 200 ml. If it is the cause of poor uterine contraction, you can take Yimoucao granules or Wuji Bifengwan orally for regulation. The reason for ten days of menstruation may also be the cause of endometritis, which can be treated with oral gynecological Qianjin tablets. To determine which cause it is, we need to test the hormone level and then check the ultrasound of uterine adnexa to make a clear diagnosis.