When should I call an ambulance or doctor?

You should consult a pediatrician if your baby is not eating or drinking enough and is showing signs of dehydration, such as a sunken fontanelle (the soft spot on the top of a baby's head), dry mouth, fewer wet diapers than usual, or a sunken appearance of the eyes. Additionally, if your baby has been vomiting, has a fever, or is lethargic, it is important to seek medical attention right away.