Urine routine red blood cell high usually suggests that the patient has hematuria, the harm is related to the cause of hematuria. If it is physiological reasons such as exercise hematuria, there may be no obvious harm; if it is pathological reasons such as urinary tract infections, urinary stones, urinary tract tumors, etc., there may be a series of hazards such as impaired renal function, and even because of the tumor is not treated in time and threatened to life. 1. Urinary system infection: If there are high red blood cells in the urine and the level of white blood cells in the urine routine exceeds the standard, these patients are usually considered as urinary system infection. Patients with hematuria may also be accompanied by urinary frequency, urinary urgency, urinary pain and other clinical manifestations. 2. Urinary stones: If the stone is too large or embedded, it may lead to damage to the mucous membrane at the stone site, resulting in high erythrocytes in urine. Patients with hematuria, may also be accompanied by severe pain in the lower back and abdomen, dysuria and other manifestations. 3. Urological system tumor: if the patient only shows high red blood cells in urine, but without pain and other discomforts, he/she should be alert to the possibility of urinary system tumor, including renal pelvis cancer, ureter cancer, bladder cancer and so on. Impaired renal function or even life-threatening may occur. There may be other reasons and hazards for high erythrocytes in urine, so it is recommended that patients go to regular hospitals in time, improve the examination to clarify the cause of the disease, and then give targeted treatment under the guidance of doctors.