Blood after taking ureteral stent is relatively common, may be due to damage to the bladder, urethra mucosa and bleeding, if the combination of infection, can also cause blood in the urine. 1. Mucosal injury: the process of taking ureteral stents, generally need to use foreign body forceps and cystoscopy, this process will damage the mucous membrane, is a normal phenomenon, even if the stone discharge process will stimulate the mucous membrane bleeding, so a small amount of bleeding do not need to worry too much. If prolonged bleeding is not enough, you need to consult a doctor immediately. 2. Urinary tract infection: stent placed for too long or do not pay attention to hygiene and bacterial infections, can cause urinary tract infection, cloudy urine, blood in the urine, urinary frequency, urgency, urinary pain and other discomforts, you can improve the routine urinalysis and other tests to clarify the diagnosis of the use of antibiotics, such as levofloxacin, cefixime and so on. It is recommended that if the patient only a small amount of blood in the urine, do not have to worry too much, if the bleeding is more than or a combination of other symptoms should be timely medical treatment, comply with the doctor’s instructions to use medication, to avoid blind use of drugs.