Urine Blockage in Newborns: Symptoms & Signs

Medically Reviewed on 11/8/2021

Urine blockage in newborns can take many forms and refers to any condition that causes the infant not to urinate or to urinate only small amounts.

Signs and symptoms depend on the type of condition that is present and include reduced urination or the absence of urination. Other associated signs and symptoms depend on the exact condition and can include

  • blood or pus in the urine (if an infection is present),
  • enlarged kidneys,
  • dark urine,
  • irritability,
  • fever,
  • poor appetite, and
  • vomiting.

Causes of Urine Blockage in Newborns

Conditions that can cause urine blockage in newborns include ureterocele, posterior urethral valves, bladder outlet obstruction, ureteropelvic junction obstruction, and diseases of the nervous system, including spina bifida and birth defects involving the spinal cord.

Other urine blockage in newborns symptoms and signs

  • Blood or Pus in the Urine (if an Infection Is Present)
  • Dark Urine
  • Enlarged Kidneys
  • Fever
  • Irritability
  • Poor Appetite
  • Reduced Urination or Absence of Urination
  • Vomiting


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Jameson, J. Larry, et al. Harrison's Principles of Internal Medicine, 20th Ed. New York: McGraw-Hill Education, 2018.