The detection of white blood cells (++) in the urine, indicating that there are white blood cells in the urine, because after all, the test came out, the urine inside the white cells themselves represent the urinary system infection, of course, there are very few may be due to pollution, especially women are more common. The most common is probably a non-specific infection, a very common bacterial infection, including urinary tract infections caused by E. coli, the white blood cells themselves are a kind of defense cells, when the urinary tract is infected, the white blood cells will come out to defend the urinary system. When there is an infection in the urinary system, the white blood cells in the urine will come out for defense and be discharged through urine, so there will be white blood cells in the urine; 2. In addition to white blood cells, some patients may also have red blood cells. Therefore, whenever white blood cells appear in the urine, the best way is to go to a urologist to see if it is normal, taking into account the relevant tests and the patient’s symptoms.