The most common diseases causing asymptomatic hematuria: 1, bladder tumor, when the tumor itself necrosis or cause local mucosal destruction bleeding, can be manifested as symptoms of hematuria. Usually, it is painless hematuria, without any urinary tract irritation, just reddish urine color. Mostly seen in elderly patients or long-term exposure to radiation, benzene paint chemical products patients, need to further cystoscopy or urinary system ultrasound to confirm the diagnosis. 2, acute glomerulonephritis, cryptoglomerulonephritis, etc. can also be symptomatic hematuria, when the renal function is completely normal, the patient does not have any edema or any hypoproteinemic manifestations, only for the intermittent or the whole process of hematuria, which may recur without any symptoms. Hematuria, can be repeated without any conscious symptoms.3, thrombocytopenia or coagulation dysfunction, then there can be asymptomatic hematuria, the patient does not have any urinary tract irritation symptoms, but belongs to the systemic coagulation dysfunction, there can be other parts of the body of the bleeding spots or the presence of unexplained bleeding gums, blood in the stool and other symptoms.