Key takeaways: Hives are raised, red or skin-colored welts that may move around and change within hours. In babies, viral infections are a very common cause, along with foods and medicines. Hives alone are usually not dangerous. Hives with trouble breathing, swelling of the face or tongue, repeated vomiting, or sleepiness may be anaphylaxis and need 911.
Hives can appear suddenly and look alarming. Most cases are mild.
What Hives Look Like
- Raised welts, red or skin-colored, often with pale centers.
- Can be small or large, and may join together.
- Often itchy.
- Individual welts usually fade within 24 hours, while new ones may appear.
Common Causes in Babies
- Viral infections, a very common cause in young children.
- Foods, such as milk, egg, peanut, or others, often within minutes to 2 hours of eating.
- Medicines, such as some antibiotics.
- Insect stings.
- Often no cause is found.
Home Care
- Keep your baby cool and comfortable.
- Cool compresses.
- Loose clothing.
- Ask your doctor before giving antihistamines. Dosing for babies depends on age and weight, and some products aren’t recommended for young children.
If You Suspect a Food
- Stop giving the food and talk to your pediatrician.
- Your doctor may refer you to an allergist for testing.
Call 911 if your baby has hives with: trouble breathing, wheezing, or coughing; swelling of the face, lips, or tongue; repeated vomiting; pale or blue color; or sudden sleepiness or floppiness. These can be signs of anaphylaxis. Call your doctor if hives last more than a few days or keep coming back.
The Bottom Line
Hives are common and usually mild, often caused by viruses. Watch for signs of a serious allergic reaction and call 911 if they appear.
Want more support for your baby’s first year? My book, From First Breath to First Birthday, is available on Amazon.
Sources
- American Academy of Pediatrics. Hives (urticaria). HealthyChildren.org. https://www.healthychildren.org
- American Academy of Allergy, Asthma and Immunology. Hives (urticaria). https://www.aaaai.org
- American Academy of Dermatology. Hives: overview. https://www.aad.org
This article is for general education and is not a substitute for individualized medical advice. Always talk with your baby’s health care provider or your own provider about your specific situation. If you think your baby or you may have a medical emergency, call 911.
