The phenomenon of blood in urine after sexual intercourse may be the result of acute urinary tract infection, infection of the genital system, or hematuria due to mucosal congestion and edema caused by local pounding. In general, when this kind of problem is found clinically, we should first clarify whether there are any uncomfortable symptoms, such as irritation of urination, urinary frequency, urinary urgency, and painful urination, and also check some relevant urinary routine, including urinary ultrasound, and also check the secretion and semen routine to determine the specific source of hematuria. In some cases, it is caused by mucosal congestion and edema, so no special treatment is needed. Drink more water, urinate more often, then make sure not to have a spicy and stimulating diet, live normally for a period of time, and observe whether you can recover. If hematuria occurs frequently after sexual intercourse and does not improve after general adjustment, you should seek medical attention promptly.