In fact, many people have some small blood clots when they come to menstruation. Then because there are some clotting factors in the body that can coagulate the blood so that a small accumulation of blood clots is formed and discharged out of the body so that you can see that there are clots. However, some patients actually have excessive menstrual flow and will have a lot of blood clots, and the clots will be relatively large, at this time should go to the hospital to see if there are some other diseases. Some patients in the outpatient clinic are especially nervous, saying why there are still clots. If she knows that there is a clotting function in the human body, she will not be nervous. It is normal to have some small blood clots during menstruation, or to have some blood clots on sanitary napkins or in the toilet. It's just that when these clots are particularly numerous, and often accompanied by an increase in menstrual flow at this time, they need to be seen by a doctor.