Normally no more than 5 leukocytes per high-powered field of view are examined using the slide method. If there are more than 5, it is considered to be an elevated white blood cell. Mainly consider some infectious diseases of the urinary system, such as urethritis, cystitis, pyelonephritis, etc.. The specific should be judged according to the symptoms of the disease. 1, in the case of urethritis, painful urination occurs, accompanied by pain in the perineum, because of the pain does not dare to urinate can be secondary to overfilling of the bladder. The number of urination can also increase, and due to inflammation stimulating the urethra, the urethral opening can have purulent discharge. 2, patients with cystitis, painful urination, burning sensation in urination, frequent urination day and night, seriously affecting the normal work and rest of patients. The feeling of incomplete urination and repeated inflammation can cause pain in the suprapubic bladder area. The urine is more cloudy. 3, pyelonephritis, patients have percussion pain in the kidney area, as well as systemic symptoms, such as fever, nausea and vomiting. There is also a tubular pattern of white blood cells in the urine. Urinalysis is a basic laboratory test, and the number of white blood cells can be characterized in a routine urine test. It is important to understand the degree of inflammation. Elevated leukocytes in the urine require aggressive testing and application of antibacterial drugs to reduce inflammation.