After vomiting, the baby usually acts extremely hungry again and wants another feeding. Vomiting may be blood tinged if it is very forceful. The vomit usually does not have greeen bile in it because the blockage is above the area of bile production. Signs of dehydration include a dry mouth, decreased wet diapers, no tears in the eyes when crying, and sunken eyes. Just after feeding, before vomiting, gastric waves may be seen going from left to right over the stomach.
Pyloric stenosis is a congenital defect, or condition present at birth.
The exact cause of this condition is unknown. It is the most common condition requiring surgery in the first 2 months of life. This condition cannot be prevented. If there is a family history of pyloric stenosis, a new baby should be closely watched for any symptoms. The healthcare provider will do a physical exam and take a full history.