Aunt refers to menstruation. On the fifth day of menstruation, there is still blood to consider with the menstruation is not completely clean, endocrine disorders, polyps, etc., for the menstruation is not completely clean for women is normal; for other reasons is considered abnormal. 1. Incomplete menstruation: the normal female menstrual cycle is 2-8 days, if a woman’s regular menstrual period is 5-7 days, there is still blood at this time is considered normal. 2. Endocrine disorders: if women work under pressure, often stay up late or combined with polycystic ovary syndrome, premature ovarian failure and other gynecological endocrine diseases, this time due to the ovary follicles irregularly discharged or not discharged, which leads to the endometrium can not be completely peeled off, which will be the prolongation of the menstrual period and other manifestations, so at this time it is considered abnormal. 3. polyps: for patients with endometrial polyps or cervical polyps, mostly irregular vaginal bleeding, prolonged menstrual period as the main clinical manifestations, at this time the fifth day of menstruation and blood is also considered abnormal. For women who have blood on the fifth day of their menstrual period, it is recommended that they go to the gynecology department of a regular hospital to improve ultrasound, sex hormones and other relevant examinations, and to clarify the cause of the disease and then actively treat it under the guidance of the doctor.