Shunt malfunction.

Cincinnati Children's Hospital Medical Center provides the following warning signs of shunt malfunction:

  •  Headaches 
  •  Vomiting  
  •  Lethargy (sleepiness)  
  •  Irritability  
  •  Swelling or redness along the shunt tract  
  •  Decreased school performance  
  •  Periods of confusion  
  •  Seizures