It is a normal physiological phenomenon that there is still light blood on the sixth day of menstruation. Menstruation is a process of periodic exfoliation and bleeding of the endometrium under the regulation of estrogen and progesterone levels in the body, and self-proliferation, repair and hemostasis. The duration of bleeding is 2-7 days, and the total bleeding volume is 30-50ml. If the endometrium is not completely repaired on the 6th day of menstruation, a small amount of blood discharge does not indicate the existence of abnormalities. It is necessary to continue to observe the bleeding situation, and if there are symptoms of prolonged periods and dripping, it is necessary to go to the hospital promptly. Depending on the test results, symptomatic treatment with medication to stop the bleeding can be taken if necessary.