Pyloric stenosis happens when the muscle below the stomach is thick and tight. Food cannot pass easily from the stomach to the intestine causing stomach contents to become blocked and begin to back up.
A pyloromyotomy is an operation to repair the pylorus. During the operation, the surgeon cuts the tight muscle between the stomach and small intestine. This loosens the muscle so the stomach can empty and food will be able to pass easily into the small intestine. This is a common, simple operation. It normally will not affect your baby’s growth.