When a girl bleeds when she goes to the toilet, whether it is bleeding from the stool or from the urine, and whether the blood comes from the urethra or from the vagina, it is important to find out the exact cause. In most cases, if the blood is from the urethra, it may be related to urinary stones or inflammation of the urethra. If the blood is from the vagina, it is most likely to be caused by functional uterine bleeding or endometrial lesions, which must be examined in detail and combined with the clinical history to arrive at a preliminary diagnosis. If the bleeding is from the bowels, it is most likely to be caused by hemorrhoids, which can rupture capillaries and cause bleeding. So we must distinguish between which part of the bleeding, it is best to go to the hospital to do the appropriate examination, only after the examination can reach a preliminary diagnosis.