High white blood cells in urine examination, mostly consider the existence of urinary tract infection, but there may be contamination of the urine specimen, need to go to the hospital for further examination and clarification.1, if the patient exists in the frequency of urination, urgency of urination, pain in urination, the number of white blood cells in the urine is elevated accompanied by the number of bacteria is elevated, it can be diagnosed as a urinary tract infection. May be due to the urethra or bladder, renal pelvis and other parts of the infection, need to determine the specific site of infection through physical examination, and then targeted medication for treatment. For example, in patients with percussion pain in the kidney area, renal pelvis infection is often considered. Patients with bladder tenderness are more likely to be considered to have cystitis. In patients with increased urethral discharge, consider urethritis. All of these lesions will lead to the above symptoms, and there will be an increase in the number of leukocytes in the urine; 2, urine specimen contamination, the patient does not have any self-awareness of symptoms, only manifested in the urine of the number of white blood cells is elevated. Often due to the urine specimen retention time is too long, such as more than two hours after the laboratory test. There are also other exogenous bacterial contamination of the urine specimen can cause elevated white blood cell counts, the need for urine review or urine culture to determine whether the urine specimen is contaminated or whether there is an infection.