Nowadays, many people pay special attention to their health problems and often go to the hospital for routine checkups, so that they can also find their conditions in time for effective treatment. There is a urine test in the routine examination, the test results appear high white blood cells is what causes it? It is mainly due to cystitis, urethritis and nephritis. 1, cystitis. Other diseases in the body can cause patients to urinate frequently, and if the urine is in the bladder for too long, then the germs inside it will infect the bladder tissue, leading to the occurrence of cystitis, which eventually causes the phenomenon of excessive white blood cells. 2, urethritis. This cause is the main factor that causes the increase of white blood cells in the test results, but patients do not need to care too much, as long as the anti-inflammatory treatment, less consumption of stimulating food, the symptoms will disappear after a period of time. 3, nephritis. This cause of the high index situation, patients need to pay attention to, it is likely that the kidney problems, need professional treatment. This is a condition where the patient’s white blood cells have changed and are likely to show symptoms of septicemia. There are many causes of leukocytosis, mainly the above three conditions. In addition to undergoing medication, patients should also pay attention to personal hygiene.