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Understanding Milk Allergy and Lactose Intolerance in Babies

If your baby is experiencing reactions after consuming “breast milk,” formula, or “cow’s milk,” it’s possible they may have a cow’s milk allergy or lactose intolerance. Common symptoms of a milk allergy include hives, itching, wheezing, difficulty breathing, constipation, and bloody diarrhea. Meanwhile, symptoms of lactose intolerance might include gas, bloating, and diarrhea. To protect your child, you may need to reduce or completely eliminate dairy from their diet. Always consult with your pediatrician if you observe any of these signs in your baby.

Cow’s Milk in a Baby’s Diet

Cow’s milk is often a staple in many children’s diets. It forms the base for most “baby formulas” and is typically the first drink children consume after moving on from formula or breast milk. Babies who have previously consumed cow’s milk-based formula without issues will likely tolerate regular cow’s milk. Even those exclusively breastfed often do well with cow’s milk since the proteins in cow’s milk are present in breast milk unless the mother has entirely avoided dairy.

milk-allergy

However, cow’s milk allergies are the most common among babies, affecting about 2-3% of children under the age of 3. It’s essential to distinguish between a milk allergy, which involves the immune system overreacting to milk proteins, and lactose intolerance, a digestive issue where the body struggles to break down lactose.

Milk Allergy vs. Lactose Intolerance: Key Differences

Milk Allergy

  • A milk allergy is an immune response where the body mistakenly identifies milk proteins as harmful, leading to the release of histamines. Symptoms can range from mild reactions such as itching, hives, and digestive discomfort, to severe reactions including difficulty breathing and anaphylaxis, a life-threatening condition.

Lactose Intolerance

  • Lactose intolerance is when the body lacks sufficient lactase, the enzyme necessary to digest lactose, the sugar found in milk. This condition is usually less severe than a milk allergy and mainly causes gastrointestinal discomfort, such as bloating, gas, and diarrhea.

Managing Milk Allergy in Babies

If your baby is diagnosed with a milk allergy, your doctor may recommend a switch to a specialty formula or, for babies over a year old, suggest a non-dairy milk alternative. Breastfeeding mothers may need to remove dairy from their diet to prevent allergic reactions in their babies. As your child grows, you’ll need to carefully avoid foods containing milk, such as yogurt, butter, cheese, and certain processed foods.

milk-allergy

Common Symptoms of a Milk Allergy:

  • Wheezing, cough, difficulty breathing
  • Itching and swelling of the face, lips, or mouth
  • Facial flushing, hives, eczema, or rash
  • Abdominal cramps, colic, constipation, or diarrhea
  • Bloody diarrhea or mucus in poop
  • Chronic runny or stuffy nose, itchy red eyes

In the case of severe reactions, such as anaphylaxis, immediate medical attention is crucial. Keep two epinephrine auto-injectors handy if your child has been diagnosed with a milk allergy.

Understanding Lactose Intolerance in Babies

Lactose Intolerance is less common in babies because almost all infants are born with the enzyme lactase, allowing them to digest their mother’s breast milk. However, lactose intolerance can develop due to genetic factors, premature birth, or temporary conditions like viral infections. For instance, a genetic disorder known as congenital lactase deficiency may cause severe diarrhea and inability to digest breast milk or formula.

Signs of Lactose Intolerance:

  • Diarrhea, blood in poop, frothy poop
  • Abdominal pain, cramping, and bloating
  • Nausea, irritability after consuming dairy
  • Difficulty settling during feeding

If your baby shows signs of lactose intolerance, consult your pediatrician, who may suggest eliminating lactose from their diet or conduct tests like hydrogen breath tests or stool tests to diagnose the condition.

milk-allergy

Helping a Child with Milk Allergy or Lactose Intolerance

The treatment for lactose intolerance often depends on the underlying cause and severity of the symptoms. Possible approaches include:

  • Dietary Adjustments: Avoiding dairy products might require a switch to lactose-free formula. Once your baby starts eating solid foods, you’ll need to avoid foods that contain dairy.
  • Lactase Enzyme Supplements: These supplements can help your baby digest dairy products if they are lactose intolerant.
  • Consulting a Dietician: If your baby cannot tolerate any dairy, a dietician can help ensure they get enough essential nutrients like calcium and vitamin D.

Additional Tips for Parents:

  • Read Food Labels Carefully: Some unexpected foods contain milk products, so check labels for ingredients such as whey, curds, milk byproducts, and dry milk solids.
  • Monitor Reactions to Dairy: Observe how your baby reacts to small amounts of dairy to determine their level of tolerance.

Conclusion

Understanding the differences between a milk allergy and lactose intolerance is crucial for managing your baby’s diet effectively. By working closely with your pediatrician and monitoring your baby’s reactions, you can ensure they grow up healthy and happy despite these dietary challenges. 

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