Cow's Milk Protein Allergy (CMPA)
IgE or Non-IgE Mediated Pediatric Food Hypersensitivity
Primary risk age: Infants (usually presenting in the first 6 months of life)
- Urgency
- Moderate
- Typical age
- Infants (usually presenting in the first 6 months of life)
- Body system
- Immunological & Allergic
Typical course: Symptoms improve within 2 to 4 weeks of dairy elimination.
Reviewed against AAP · CDC · WHO · NHS guidance Last reviewed 2026-06-13
1. Summary & Pathophysiology
IgE or Non-IgE Mediated Pediatric Food Hypersensitivity
Pathophysiology (Development Path)
The infant's immune system identifies cow's milk proteins as foreign antigens. In IgE-mediated CMPA, this causes mast cell degranulation and histamine release. In non-IgE mediated CMPA, T-cells trigger local inflammation in the intestinal mucosa, leading to malabsorption and blood loss.
Primary Causes & Etiology
Immune system hypersensitivity to casein or whey proteins found in cow's milk. Can occur in breastfed or formula-fed infants.
2. Symptom Continuum
- Early Onset Signs
Spitting up, mild colic, fussiness after feeding, and occasional loose stools.
- Progressive Phase
Eczema, chronic diarrhea, stools containing mucus or visible blood, vomiting, and poor weight gain (failure to thrive).
- Severe Indicators
Anaphylaxis (swelling, hives, wheezing, hypotension) following milk exposure, severe enteropathy, and severe anemia due to intestinal blood loss.
3. Clinical Verification
Elimination diet (removing cow's milk from maternal diet or switching to hydrolyzed formula) followed by challenge. Skin prick tests or IgE levels if IgE-mediated.
4. Care & Elements Plan
Primary Care Treatment Plan
Strict elimination of cow's milk proteins. For formula-fed infants, switch to extensively hydrolyzed or amino acid-based formula. Breastfeeding mothers must eliminate dairy from their diet.
Home Support Elements
Read all food labels carefully to avoid hidden dairy. Reintroduce dairy only under medical supervision after a specified period.
Generic Active Ingredients (No Brands)
- Extensively Hydrolyzed Formula (specialized dairy-free formula)
- Epinephrine auto-injector (if history of anaphylaxis).
Lists active elements only. Never administer self-designed therapies.
5. Doctor Critical Lines
Critical Thresholds: When to See a Doctor
Consult if the infant has blood in their stool, persistent vomiting, eczema, or poor growth. Call emergency services for breathing difficulty or facial swelling.
6. Vaccine & Prevention
Routine Prophylaxis (Prevention)
Exclusive breastfeeding for the first 4-6 months. No other preventive methods exist.
Immunization Context
Not applicable.
7. Timelines & Outlook
Active Timeline
Symptoms improve within 2 to 4 weeks of dairy elimination.
Expected Prognosis
Excellent. Most children outgrow CMPA by age 3 to 5 years.
Potential Untreated Complications
Failure to thrive, severe anemia, anaphylaxis, and increased risk of other food allergies.
More in Hypersensitivities & Atopic Responses
Emergency Anaphylaxis (Pediatric)
Acute Systemic IgE-Mediated Hypersensitivity Reaction
All pediatric ages (Infants and young children have unique symptom presentations)
Mild Allergic Rhinitis (Hay Fever)
Type I IgE-Mediated Nasal Mucosal Hypersensitivity
Preschoolers through Adolescents (Rarely diagnosed before 2 years of age)
Moderate Urticaria (Hives)
Raised, itchy welts from temporary leakage of fluid from small skin blood vessels.
All ages.