Pyloric Stenosis Symptoms & Causes

LIke ThisLIke ThisLIke ThisLIke ThisLIke This


How does a child get pyloric stenosis?

  • Pyloric stenosis occurs when the muscle surrounding the pyloric sphincter at the outlet to the stomach becomes thickened. This thickening can block the pyloric channel preventing the passage of feedings from the stomach into the small intestine. Vigorous contractions of the stomach wall attempt to force the feedings through the obstruction, but as it becomes tighter, these contractions result instead in the projectile vomiting.
  • Pyloric stenosis is more common in boys than girls, and it occurs in up to 1 percent of otherwise healthy infants.
We are grateful to have been ranked #1 on U.S. News & World Report's list of the best children's hospitals in the nation for the third year in a row, an honor we could not have achieved without the patients and families who inspire us to do our very best for them. Thanks to you, Boston Children's is a place where we can write the greatest children's stories ever told.”
- Sandra L. Fenwick, President and CEO

Boston Children's Hospital
300 Longwood Avenue, Boston, MA 02115
For Patients: 617-355-6000
For Referring Providers: 844-BCH-PEDS | 844-224-7337