The causes of urinary tract infections in female babies include the following conditions. First, caused by the failure of local hygiene of the vulva. If the baby girl’s diapers are not changed diligently or often wear crotch pants, it will cause an upstream infection of the urinary tract, that is, the baby girl has unhygienic vulva, upward invasion of the urinary tract caused by urinary tract infection. The length of the urethra of the baby girl itself is shorter and more prone to urinary tract infections. Second, the situation caused by urinary tract deformity. If a baby girl has a deformity of the urinary tract, it can cause repeated urinary tract infections. Finally, caused by bloodstream infections. If the baby girl has a serious bacterial infection or even sepsis, it can cause a urinary tract infection in the baby girl through the bloodstream.