Hives (Urticaria) in Babies & Toddlers
Content reviewed against published AAP, ACAAI, AAP guidelines
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Hives (urticaria) are raised, itchy welts that can appear anywhere on the body. Individual welts are typically red or pink with a pale center, vary in size from small dots to large patches, and characteristically move around — appearing in one area and disappearing within hours only to appear elsewhere. In babies and toddlers, hives are most often triggered by viral infections rather than allergies.
Key takeaways
- Hives (urticaria) are raised, itchy welts that can appear anywhere on the body.
- Most common cause: Viral infection (most common trigger in young children)
- Emergency: Hives with difficulty breathing, wheezing, or throat tightness (anaphylaxis)
- Home care: Give age-appropriate oral antihistamine (cetirizine/Zyrtec for 6+ months, diphenhydramine/Benadryl for 2+ years per doctor dosing)
Possible Causes
When to Seek Help
Emergency — Call 911 or go to ER:
- Hives with difficulty breathing, wheezing, or throat tightness (anaphylaxis)
- Hives with swelling of tongue, lips, or throat
- Hives with vomiting, dizziness, and feeling faint (systemic reaction)
- Hives within minutes of known allergen exposure with any breathing difficulty
- Baby appears limp or loses consciousness with hives
Urgent — See doctor today:
- Hives with facial swelling (angioedema) but no breathing difficulty yet
- Widespread hives immediately following a new food or medication
- Hives with abdominal pain and joint swelling (possible serum sickness)
- Hives not responding to antihistamine and spreading rapidly
Same-day appointment:
- First episode of hives for evaluation and allergy action plan
- Hives following a new medication (may need to stop the medication)
- Recurrent hives without clear trigger needing investigation
Monitor at home:
- Mild hives during a viral illness that respond to antihistamine
- Single episode of hives that resolves with antihistamine and no systemic symptoms
- Known trigger-associated hives managed with established action plan
By Age
0-6 months
Normal: Hives are less common under 6 months. Erythema toxicum in newborns can look similar but is a benign newborn rash (not true hives).
Worry if: Hives with facial or lip swelling (angioedema), hives with difficulty breathing or wheezing, hives with vomiting shortly after feeding a new food (possible food allergy/anaphylaxis).
6-12 months
Normal: Hives may appear during or after viral illnesses and can last several days. This is common and usually benign. Food-related hives are possible as new foods are introduced.
Worry if: Hives within minutes of eating a new food (especially peanut, egg, milk, or tree nuts), hives with facial swelling or vomiting, or hives with any respiratory symptoms.
1-3 years
Normal: Viral-associated hives are very common in toddlers. They may appear during a cold and persist for days or even weeks. Individual welts move around and resolve within 24 hours even if new ones appear.
Worry if: Hives with throat tightness, drooling, difficulty swallowing, or breathing changes. Hives with swelling of tongue or lips. Hives lasting longer than 6 weeks (chronic urticaria — needs evaluation).
Any age
Normal: Acute hives (lasting less than 6 weeks) are extremely common in childhood and are usually self-limiting.
Worry if: Signs of anaphylaxis: hives PLUS difficulty breathing, facial/throat swelling, vomiting, dizziness, or multiple body systems involved. This requires immediate epinephrine and 911.
Home Care
- Give age-appropriate oral antihistamine (cetirizine/Zyrtec for 6+ months, diphenhydramine/Benadryl for 2+ years per doctor dosing)
- Apply cool compress to itchy areas (not ice directly on skin)
- Dress baby in loose, soft cotton clothing
- Lukewarm oatmeal bath to soothe itching
- Avoid hot baths which can worsen hives
- If food allergy suspected, note everything eaten in the prior 2 hours and avoid that food until evaluation
- Take photos of the hives to show the doctor (they often disappear before the appointment)
- If child has a prescribed epinephrine auto-injector, keep it accessible
- Note timing: did hives appear within minutes of a food (IgE allergy) or hours later (less likely allergy)?
Need help deciding what to do?
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Sources
All content follows our editorial policy and is reviewed against published clinical guidelines.
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Related Symptoms
Bottom line
Most cases of hives (urticaria) in babies are not emergencies. However, seek immediate care if hives with difficulty breathing, wheezing, or throat tightness (anaphylaxis).
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.