In pyloric stenosis, the muscle in the lower part of your baby's stomach, called the pylorus, will ...
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In pyloric stenosis, the muscle in the lower part of your baby's stomach, called the pylorus, will not allow milk to pass through into the small intestine. Normally, the pyloris contracts or gets smaller to keep food in the stomach and then relaxes, growing larger to let food out. In pyloric stenosis, the muscle is too big. It doesn't relax enough so it stays tight. Symptoms may start when your baby is around 3 weeks old. They may include vomiting, constipation, green diarrhea, weight loss, and stomach pain after eating. Pyloric stenosis is treated with surgery to loosen the muscle so food can pass easily out of the stomach.
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