When a urinary tract infection is carried out, the urine routine examination can show elevated urine leukocytes, when there are pathogenic bacteria in the urinary tract, the body’s white blood cells will play their immune role and enter the urine to engulf the pathogenic bacteria in the urine, after engulfing the pathogenic bacteria, the white blood cells form pus cells, so when the urinary tract infection, the urine laboratory examination will show elevated white blood cells. If the urinary tract infection is further aggravated and causes systemic infection, routine blood tests may also show an increase in the number of leukocytes and an increase in the number of neutrophils in the routine blood tests. At this point, combined with the patient’s symptoms, the presence of a urinary tract infection can be confirmed and requires medication. However, it is also possible that the patient does not have any conscious symptoms, but during the process of urine specimen collection, the urine is contaminated, such as contamination by pathogenic microorganisms, or the urine has been left for too long, and its own corruption, bacterial multiplication and elevated urine leukocytes, in this case, the patient usually does not have any conscious symptoms, it is necessary to conduct a routine urine review, or if necessary, urine culture to further confirm the diagnosis.