What causes white blood cells in urine?

White blood cells in urine, that is, urinary tract infection, can be divided into upper urinary tract (pyelonephritis, ureteritis and lower urinary tract infection (cystitis, urethritis, its incidence and drinking, spicy diet, decreased immunity, husband and wife life and urinary diseases. Common clinical manifestations are frequent micturition, urgency, pain, lower abdominal discomfort or pain, lumbago and fever, urine routine visible white blood cells, sometimes red blood cells, urinary ultrasound generally no abnormality. Anti-infection is the main treatment, empirical drugs can be given or sensitive antibiotics can be selected according to the results of urine culture.