It is not normal to have only a little blood after 2 days of menstruation. The normal amount of a menstrual period is 20-60 ml. It is not normal for a patient to have only a little bit of blood after two days of menstruation, which may be caused by hypomenorrhea, abnormal uterine bleeding, and so on. Low menstrual flow is usually caused by excessive exercise, dieting and other factors, these factors will affect the thickness of the uterine lining, making the uterine lining too thin, causing low menstrual flow, resulting in the phenomenon of a little bit of blood after two days of menstruation. Most of the abnormal uterine bleeding is anovulatory dysfunctional uterine bleeding, due to incomplete shedding of the endometrium, so the amount of menstrual flow may be very small, and the bleeding usually stops in a few days, resulting in the phenomenon of a little bit of blood for two days after the menstrual period. It is recommended that when the patient has the phenomenon of menstruation for 2 days with only a little bit of blood, he/she can go to the hospital for consultation, to clarify the cause, and under the guidance of the doctor for treatment.