Pyloric stenosis (patient information)

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What is Pyloric stenosis?

Pyloric stenosis is a narrowing of the pylorus, the opening from the stomach into the small intestine.

What are the symptoms of Pyloric stenosis?

Symptoms generally appear several weeks after birth:

• Abdominal fullness prematurely after meals
• Abdominal pain
• Belching
• Constant hunger
• Dehydration (gets worse with the severity of the vomiting and diarrhea)
• Diarrhea (loose, watery stools)
• Failure to gain weight or weight loss
• Wave-like motion of the abdomen shortly after feeding and just before vomiting occurs
• Vomiting
  • Persistant vomiting after every feeding
  • Projectile vomiting

What are the causes of Pyloric stenosis?

Pyloric stenosis is caused by a thickening of the muscles of the pylorus. This thickening prevents the stomach from emptying into the small intestine. The cause of the thickening is unknown, although genetic factors may play a role.

Where to find medical care for Pyloric stenosis

Directions to Hospitals Treating Pyloric stenosis