Hematuria with blood clots can be caused by menstruation, inflammation of the urinary tract, urinary stones, and other factors. 1. Menstruation: menstruation is caused by the fall of the female uterine lining, the uterine lining will be mixed with menstrual blood, when urinating, menstruation will usually be mixed with urine, the phenomenon of hematuria with blood clots will occur. 2. urinary tract inflammation: inflammation stimulates the urethral mucosa, will cause local congestion and edema, and then appear hematuria with blood clots. 3. Urinary stones: the etiology of urinary stones is more complex. The main reason is the body’s metabolic changes, some may be the existence of systemic morbidity factors, followed by local factors such as the living environment, climate, water and dietary habits, etc., a combination of factors, so that the urinary tract stone or infection phenomenon, the stone usually stimulate the mucosa of the urethra, which can lead to hematuria with blood clots. The phenomenon of hematuria with blood clots may also be related to other factors, therefore, should be timely and regular hospital visits to check the cause.