The healthcare provider will do a physical exam and take a full history. The healthcare provider may ask such questions as:
The healthcare provider may be able to feel a small mass in the upper right side of the baby's abdomen. Blood may be taken from a vein, and a chem-7 blood test may reveal a salt imbalance. A blood test called a complete blood count, or CBC, may reveal high hemoglobin and hematocrit counts, indicating an increase in the amount of iron and blood volume. An abdominal ultrasound usually confirms the diagnosis of pyloric stenosis. Sometimes, x-rays of the upper gastrointestinal tract, called an upper GI series, may be done.