If white blood cells appear in the urine, it is necessary to consider whether there are symptoms or not. If there is fever, frequent urination, urgency of urination, low back pain, etc., it may be a kidney or urinary tract infection. Many normal people, especially women, often have asymptomatic white blood cells in their urine. This situation does not need much concern. But pregnant women and children who have white blood cells in their urine should not take it lightly. They should go to the hospital for urine culture tests.