Some newborns may not urinate because of insufficient milk intake after birth. Infection: When pathogenic bacteria invade the urinary tract causing acute urinary tract infection, bladder congestion and edema can occur, which can lead to a day-old baby has not been urinating, can be given antibiotic treatment under the guidance of neonatologists, generally can gradually improve the symptoms, to promote the normal discharge of urine, and at the same time to give the baby more warm water or increase the number of feedings, help generate more urine flush the urethra, facilitate This will help produce more urine to flush the urinary tract and facilitate the discharge of pathogenic bacteria and shorten the course of the disease.