Baby Hives (Urticaria)
Medically reviewed by Dr. Sarah Chen, MD, FAAP · Board-Certified Pediatrician
Content reviewed against published AAP, AAP, CDC guidelines
Last reviewed:
Baby skin is sensitive and changes frequently. If you are noticing baby hives (urticaria), here is what you need to know.
The short answer
Hives are raised, red, itchy welts that can appear suddenly on your baby's skin. They are most often caused by a viral infection or an allergic reaction to food, medication, or an insect bite. While they can look alarming, hives are usually harmless and resolve on their own, though any breathing difficulty needs immediate emergency care.
Key takeaways
- Hives are raised, red, itchy welts that can appear suddenly on your baby's skin. They are most often caused by a viral infection or an allergic reaction to food, medication, or an insect bite. While they can look alarming, hives are usually harmless and resolve on their own, though any breathing difficulty needs immediate emergency care.
- Usually normal when: A few scattered hives that appear during a viral illness and resolve within a day or two
- Call your doctor if: Your baby develops swelling of the lips, tongue, or face along with hives, which could indicate anaphylaxis -- call 911
- Varies by age — see the age-by-age breakdown below
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What Parents Should Know
According to AAP, CDC guidelines, hives are raised, red, itchy welts that can appear suddenly on your baby's skin. They are most often caused by a viral infection or an allergic reaction to food, medication, or an insect bite. While they can look alarming, hives are usually harmless and resolve on their own, though any breathing difficulty needs immediate emergency care. At 0-6 months, hives in young infants are relatively uncommon but can occur. In this age group, they are most often triggered by a viral illness or, less commonly, a reaction to something in breast milk or formula. If your baby develops hives, watch closely for any signs of difficulty breathing, facial swelling, or persistent vomiting, and call your doctor promptly. It is generally considered normal when a few scattered hives that appear during a viral illness and resolve within a day or two. However, you should contact your pediatrician promptly if your baby develops swelling of the lips, tongue, or face along with hives, which could indicate anaphylaxis -- call 911.
Normal vs. Concerning
By Age
What to expect by age
0-6 months
Hives in young infants are relatively uncommon but can occur. In this age group, they are most often triggered by a viral illness or, less commonly, a reaction to something in breast milk or formula. If your baby develops hives, watch closely for any signs of difficulty breathing, facial swelling, or persistent vomiting, and call your doctor promptly.
6-12 months
As babies begin eating solid foods, hives may appear as part of an allergic reaction to a new food. Common triggers include egg, milk, peanut, tree nuts, wheat, soy, fish, and shellfish. Hives that appear within minutes to a couple of hours after trying a new food should be reported to your pediatrician to discuss allergy testing.
1-2 years
Viral infections are the most common cause of hives in toddlers. It is very common for a child to develop hives during or shortly after a cold, stomach bug, or other viral illness. These viral-associated hives can come and go for days to weeks but are not dangerous. Antihistamines approved for your child's age can help with itching.
2-3 years
In this age group, hives can be triggered by infections, food, insect bites or stings, medications, or sometimes environmental exposures. If hives recur frequently, keeping a diary of foods, activities, and exposures before each episode can help identify patterns to discuss with your pediatrician.
What to Tell Your Pediatrician
- Describe when you first noticed baby hives (urticaria) and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if hives appear within minutes to hours of trying a new food and you want to discuss allergy testing.
- Mention if hives are recurring frequently and you cannot identify the trigger.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- A few scattered hives that appear during a viral illness and resolve within a day or two
- Hives that pop up, disappear, and move to different locations over the course of hours
- Mild hives that respond to an age-appropriate dose of antihistamine
- Individual hives that last less than 24 hours each, even if new ones keep appearing
- Hives appear within minutes to hours of trying a new food and you want to discuss allergy testing
- Hives are recurring frequently and you cannot identify the trigger
- Your baby is very uncomfortable from itching despite antihistamine use
- Hives persist for more than a week without a clear viral illness
- Your baby develops swelling of the lips, tongue, or face along with hives, which could indicate anaphylaxis -- call 911
- Your baby has any difficulty breathing, wheezing, or a hoarse cry along with hives -- call 911 immediately
- Your baby is vomiting repeatedly or seems limp or unusually drowsy after developing hives
What You Can Do at Home
- Keep track of when you notice baby hives (urticaria) — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that a few scattered hives that appear during a viral illness and resolve within a day or two — this is generally within the range of normal.
- At 0-6 months, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Use fragrance-free, hypoallergenic products on your baby's skin. Avoid over-bathing — 2-3 baths per week is usually sufficient.
- While monitoring at home, seek immediate care if your baby develops swelling of the lips, tongue, or face along with hives, which could indicate anaphylaxis -- call 911.
Related Resources
Rash Decision Tree
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Baby Skin Conditions Guide
Visual guide to common baby skin conditions, rashes, and when to see a doctor.
Month-by-Month Development
Detailed monthly development guides from birth through 24 months.
When to Call the Doctor
General guide on when to call the pediatrician, visit urgent care, or go to the ER.
Frequently asked questions
Is baby hives (urticaria) normal?
When should I call the doctor about baby hives (urticaria)?
When is baby hives (urticaria) normal?
What causes baby hives (urticaria)?
What should I mention to my pediatrician about baby hives (urticaria)?
Is baby hives (urticaria) normal at 0-6 months?
Is baby hives (urticaria) normal at 6-12 months?
Should I go to the ER for baby hives (urticaria)?
Does baby hives (urticaria) go away on its own?
References
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss Baby Hives (Urticaria).
Things to mention
- Describe when you first noticed baby hives (urticaria) and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if hives appear within minutes to hours of trying a new food and you want to discuss allergy testing.
- Mention if hives are recurring frequently and you cannot identify the trigger.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- Hives appear within minutes to hours of trying a new food and you want to discuss allergy testing
- Hives are recurring frequently and you cannot identify the trigger
- Your baby is very uncomfortable from itching despite antihistamine use
Urgent signs to report immediately
- Your baby develops swelling of the lips, tongue, or face along with hives, which could indicate anaphylaxis -- call 911
- Your baby has any difficulty breathing, wheezing, or a hoarse cry along with hives -- call 911 immediately
- Your baby is vomiting repeatedly or seems limp or unusually drowsy after developing hives
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members
Related Resources
Bottom line
Most cases of baby hives (urticaria) are normal. Talk to your pediatrician if your baby develops swelling of the lips, tongue, or face along with hives, which could indicate anaphylaxis -- call 911.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
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