There is no obvious bleeding during menstruation, but the presence of blood clots when you go to the toilet may be a normal phenomenon, or it may be caused by menstrual disorders, uterine fibroids, or residual after abortion. 1. Normal factors There is no obvious bleeding during menstruation, but the presence of blood clots when going to the toilet may be a normal manifestation when menstruation has just begun. If the patient’s menstrual cycle is regular and the amount of menstruation is normal, it is usually a normal phenomenon. 2. Pathological factors (1) Menstrual disorders: if there is no obvious bleeding during menstruation but clots appear when going to the toilet, it may be a menstrual disorder caused by the patient’s recent mental stress, and in addition to clots, the patient may also have irregular menstrual cycles. (2) Uterine fibroids: There is no obvious bleeding during menstruation, but the presence of blood clots when going to the toilet may also be due to increased menstrual flow caused by uterine fibroids, and if the menstrual blood doesn’t flow out smoothly, there may be clots when going to the toilet. (3) Residual after abortion surgery: There is no obvious bleeding during menstruation, but blood clots when going to the toilet may be caused by the fact that the abortion surgery did not remove the intrauterine tissues completely, and the residual intrauterine tissues are discharged outward at the time of the next menstruation, which is not the arrival of the real menstruation. If there is no obvious bleeding during menstruation, but blood clots appear when you go to the toilet, there may be other reasons. It is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.