Cow's Milk Allergy: Symptoms, Causes & Treatment
حساسية الحليب
Cow's milk allergy is an immune reaction to milk proteins, common in infants and young children and different from lactose intolerance. Its symptoms are skin, digestive, and respiratory and may be severe. It is managed by avoiding milk and its products and choosing suitable alternatives, and many children outgrow it with age.
What is Cow's Milk Allergy?
Cow's milk allergy is among the most common food allergies in infants and young children. It is a reaction of the immune system in which the body mistakenly treats cow's milk proteins as a harmful substance, releasing an allergic response that appears as varied symptoms.
It is very important to distinguish milk allergy from lactose intolerance, as they are entirely different conditions: milk allergy is an immune reaction to the protein and may be severe and usually affects young children, while lactose intolerance is a digestive problem due to a deficiency of the enzyme that digests milk sugar (lactose), causing bloating and diarrhea without an immune danger. Milk-allergy symptoms appear on the skin (rash, eczema, swelling), the digestive system (vomiting, diarrhea, cramps, blood in stool), and the respiratory system, and in severe cases may reach a life-threatening allergic reaction (anaphylaxis).
Managing milk allergy relies on completely avoiding cow's milk and its derivatives, with careful reading of food labels because milk protein is in many products. For infants, the doctor guides choosing the suitable alternative (a special hydrolyzed-protein formula), while a breastfeeding mother may be advised to adjust her diet. The reassuring news is that the vast majority of children outgrow milk allergy with age (often before school). Because of the importance of correct diagnosis and avoiding unnecessary milk deprivation, evaluation by a pediatrician or allergist is essential, with an emergency plan available for those at risk of a severe reaction.
Symptoms
- Skin rash, eczema, and swelling around the mouth.
- Vomiting, diarrhea, cramps, and blood in the stool.
- Runny nose, wheezing, and cough.
- In severe cases: anaphylaxis (breathing difficulty, swelling, and collapse) requiring emergency care.
Causes
- An immune reaction to cow's milk proteins.
- Immaturity of the immune and digestive systems in infants.
- A genetic predisposition to allergy (children from allergic families).
Diagnosis
- Clinical assessment and symptom history and its relation to milk.
- Allergy tests (skin-prick or IgE test).
- Elimination and reintroduction testing under medical supervision when needed.
Treatment
Avoidance
- Completely avoiding cow's milk and its derivatives and reading food labels carefully.
Alternatives and management
- For infants: a special hydrolyzed-protein formula prescribed by the doctor, and adjusting a breastfeeding mother's diet when needed.
- An emergency plan and adrenaline auto-injector for those at risk of a severe reaction.
This content is educational and does not replace consulting a pediatrician or allergist.
Complications
- Life-threatening anaphylaxis in severe cases.
- Malnutrition and growth deficit with unbalanced milk deprivation.
- Parental anxiety and difficulty choosing foods.
Prevention
- There is no proven prevention, and breastfeeding may be beneficial.
- Introducing foods with the doctor's advice, especially with a family allergy history.
- Strictly avoiding milk once allergy is confirmed and following the emergency plan.
When to see a doctor
Go to the emergency department immediately for signs of a severe allergic reaction: breathing difficulty, swelling of the face or throat, severe vomiting, lethargy, or pallor after consuming milk. See a doctor to evaluate any recurrent milk-allergy symptoms. Book an appointment with a pediatrician or allergist on ClinicsJo.