The normal menstrual period is 3-5 days, if the period is more than 7 days and still not clean, you need to see a doctor to find the cause, according to the cause of treatment, as follows: 1, if the menstrual period is long and not clean, do not matter, consider that may be slow contraction of the uterus, you can eat under the guidance of the doctor Yi Mu Cao punch, help promote the contraction of the uterus, can be faster to end the menstruation, the menstrual blood diarrhea clean If the body’s estrogen level is low, the endometrium grows slowly after the menstrual period, which can easily lead to continuous menstruation, and can be treated with estrogen supplementation under the guidance of the doctor to help stop the bleeding faster; 3. If there are residues in the uterine cavity from ultrasound examination, such as those caused by drug abortion, new biochemical pellets can be used under the guidance of the doctor.