Pyloric stenosis is a
problem with a baby’s stomach that causes forceful vomiting. It happens when
the baby's pylorus, which connects the stomach and the small intestine, swells
and thickens. This can keep food from moving into the
A baby may get pyloric
stenosis anytime between birth and 5 months of age. Boys are more likely than girls to get it. It usually starts about 3
weeks after birth. If your baby was born early (premature), symptoms may start
What causes pyloric stenosis?
Experts don't know what causes pyloric stenosis. It may be passed down through families.
What are the symptoms?
A baby with pyloric stenosis may:
Vomit soon after a
Have a full, swollen upper belly after a
Act fussy and hungry a lot of the time.
Have fewer and
harder stools than normal.
Pass less urine than normal.
starts gradually. As the pylorus becomes tighter, the
vomiting may become more frequent and more forceful.
Pyloric stenosis is treated
with surgery to widen the opening between the stomach and the small intestine. Surgery rarely causes problems, and almost
all babies recover completely. After surgery, your baby probably won't get
pyloric stenosis again.
Your baby likely will be ready to go home within 2 days after surgery. Being involved in your baby's care while he or she is in the hospital may help you feel more comfortable when you take your baby home. Talk with the doctor about how to feed your baby and what to expect. It's normal to feel nervous, but don't be afraid to hold and handle your baby.
This American Academy of Pediatrics website has information for parents about childhood issues, from before the child is born to young adulthood. You'll find information on child growth and development, immunizations, safety, health issues, behavior, and much more.
American Academy of Pediatrics
141 Northwest Point Boulevard
Elk Grove Village, IL 60007-1098
The American Academy of Pediatrics (AAP) offers a
variety of educational materials about parenting,
general growth and development, immunizations, safety, disease prevention, and more. AAP guidelines for various conditions and links to other
organizations are also available.
American College of
6400 Goldsboro Road
Bethesda, MD 20817
The American College of Gastroenterology is an organization of digestive disease specialists. The website contains information about common gastrointestinal problems.
KidsHealth for Parents, Children, and
Nemours Home Office
10140 Centurion Parkway
Jacksonville, FL 32256
This website is sponsored by the Nemours Foundation. It
has a wide range of information about children's health—from allergies and
diseases to normal growth and development (birth to adolescence). This website
offers separate areas for kids, teens, and parents, each providing
age-appropriate information that the child or parent can understand. You can
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Greenup RA, Calkins CM (2011). Infantile hypertrophic pyloric stenosis. In CD Rudolph et al., eds., Rudolph’s Pediatrics, 22nd ed., pp. 1420–1421. New York: McGraw-Hill.
Hunter AK, Liacouras CA (2011). Pyloric stenosis and other congenital anomalies of the stomach. In RM Kliegman et al., eds., Nelson Textbook of Pediatrics, 19th ed., pp. 1274–1276. Philadelphia: Saunders.
Middlesworth W, Kadenhe-Chiweshe A (2006). Neonatal intestinal obstruction. In FD Burg et al., eds., Current Pediatric Therapy, 18th ed., pp. 289–293. Philadelphia: Saunders Elsevier.
Safford SD, et al. (2005). A study of 11,003 patients with hypertrophic pyloric stenosis and the association between surgeon and hospital volume and outcomes. Journal of Pediatric Surgery, 40(6): 967–973.
Semrin MG, Russo MA (2010). Anatomy, histology, embryology, and developmental anomalies of the stomach and duodenum. In M Feldman et al., eds., Sleisenger and Fordtran’s Gastrointestinal and Liver Disease, 9th ed., vol. 1, pp. 773–788. Philadelphia: Saunders.
Sundaram S, et al. (2011). Gastrointestinal tract. In WW Hay et al., eds., Current Diagnosis and Treatment: Pediatrics, 20th ed., pp. 595–630. New York: McGraw-Hill.
Wegner KJ (2006). Pyloric stenosis. In MR Dambro, ed., Griffith's 5-Minute Clinical Consult, pp. 940–941. Philadelphia: Lippincott Williams and Wilkins.
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