High-Risk Baby Peanut Introduction
Severe persistent eczema, an existing egg allergy, or an immediate reaction to another food can place an infant at higher peanut-allergy risk. Do not guess from a rash photo or family history alone; ask the pediatrician or allergist how and where to introduce peanut.
Summary
The clinician may recommend evaluation, testing, or supervised feeding depending on the baby's history. Testing alone does not prove clinical allergy, so follow the complete plan. The baby must also be developmentally ready for solids and receive only an infant-safe form. Do not delay an emergency because a reaction does not match a test result.
Review allergy risk before peanut
Severe persistent eczema, diagnosed egg allergy, or an immediate reaction to another food can place a baby at higher peanut-allergy risk. Ask the pediatrician or allergist how and where peanut should be introduced and whether evaluation, testing, or supervised feeding is appropriate. A family history alone does not diagnose the baby, and a test result alone does not prove clinical allergy. Follow the clinician's full plan and do not attempt a home challenge after a previous immediate reaction.
Confirm developmental readiness
A baby should have good head control, sit upright with support, bring food toward the mouth, and swallow rather than automatically push food out before allergen introduction. Readiness is developmental, not a birthday alone. Continue breast milk or formula as the main nutrition while complementary foods begin. Do not start during acute illness, when the baby is unusually tired, or when no responsible adult can observe. If feeding skills or growth are uncertain, ask the pediatrician before introducing new textures.
Use one food in a safe texture
Introduce one new allergenic food at a time in a texture matched to current feeding skills. Whole peanuts, tree nuts, nut pieces, and thick sticky spoonfuls of nut butter are choking hazards. Smooth nut food can be thinned into a runny puree according to guidance. Egg should be thoroughly cooked and mashed or softened. Seat the baby upright and supervise every bite.
Recognize possible allergic reactions
Watch for hives, widespread redness, facial or eyelid swelling, repeated vomiting, diarrhea, persistent cough, wheeze, voice or cry change, sudden sleepiness, pallor, or unusual behavior after eating. Stop the food and contact a clinician promptly. A little redness only where acidic food touched the skin can be irritation, but do not diagnose from appearance alone. Record exact onset, food, amount, preparation, all body systems affected, duration, and treatment. Photographs can support a history but must not delay care.
Act on anaphylaxis immediately
Severe breathing or swallowing difficulty, sudden swelling of the lips, mouth, tongue, or throat, blue or gray color, collapse, difficulty waking, or symptoms involving more than one body system can signal anaphylaxis. Use prescribed epinephrine immediately according to the baby's written action plan and call emergency services. Do not wait for a rash, give food or drink, or delay for antihistamine, photographs, a second opinion online, or transport by yourself when emergency services are indicated.