What are the potential consequences of untreated pyloric stenosis?

Untreated pyloric stenosis can lead to severe dehydration and forceful vomiting, which are critical and concerning symptoms. Pyloric stenosis is a condition where the pylorus, the opening from the stomach into the small intestine, becomes narrowed, obstructing the flow of food. As a result, infants often experience projectile vomiting after feeding, which can quickly lead to a significant loss of fluids and electrolytes. This vomiting is not typical spitting up; instead, it is often characterized by being forceful and occurs shortly after feeding.

The subsequent dehydration can impact the infant's overall health, leading to lethargy, dry mucous membranes, and decreased urine output. Additionally, the body's inability to adequately retain fluids due to continued vomiting exacerbates the risk for more serious complications, such as electrolyte imbalances or metabolic alkalosis. Hence, recognizing and addressing these symptoms early is vital for the health and well-being of the affected infant.