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What causes projectile vomiting in infants?

Howard I. Baron, MD
Pediatric Gastroenterology
Projectile vomiting in infants is often caused by pyloric stenosis, says Howard Baron, MD, a pediatric gastroenterologist at Sunrise Hospital. In this video, he describes what doctors can do to treat this condition. 
Dr. Mehmet Oz, MD
Cardiology (Cardiovascular Disease)
In infants, projectile vomiting happens when a baby has a condition called pyloric stenosis: an overdeveloped pylorus muscle at the bottom of the stomach. When the muscle tightens, it causes the entire contents of the stomach to empty, going "up and out," which can lead to dehydration. It usually happens in firstborn males, at around four to six weeks of age and tends to run in families. To a doctor conducting a physical exam of the abdomen, an overgrown pylorus will feel like an olive, and he can see it using ultrasonography. Pyloric stenosis can be fixed surgically.
YOU: Raising Your Child: The Owner's Manual from First Breath to First Grade

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.