Lactose intolerance in newborn babies is a rare condition called congenital lactase deficiency. Infants with this type of food intolerance can't drink breast milk or lactose-containing formula because their bodies lack the enzyme needed to break down lactose, a sugar in milk products. Consult your medical provider if you have questions or concerns about lactose intolerance in your newborn baby.
Incidence
As of January 2011, the incidence of lactase deficiency in newborn infants is not known. Congenital lactose intolerance occurs most frequently in babies born in Finland. In fact, health professionals with Genetic Home Reference estimate that 1 in every 60,000 babies born in Finland have this form of lactose intolerance.
Signs and Symptoms
The most common symptom associated with lactose intolerance in newborns is diarrhea. Babies born with this condition experience frequent loose bowel movements from birth and are at an increased risk of becoming dehydrated. If your infant exhibits signs of dehydration, including lethargy, sunken eyes, lack of tears or a sunken soft spot on the top of his head, taken him to a doctor immediately for further evaluation and treatment.
Medical Complications
Newborn babies who develop chronic diarrhea or vomiting due to lactose intolerance may not get the nutrients they need to maintain healthy growth and development. Thus, babies with this food intolerance may fail to thrive and are at risk of developing potentially fatal health complications.
Treatment
Currently, there is no known cure for congenital lactase deficiency. Typically, newborn infants with this condition are given lactose-free formula, which reduces lactose intolerance symptoms and supports healthy development and growth. Be sure to contact your doctor promptly if you suspect your infant is lactose intolerant.


