Baby Symptoms & Conditions

Being a new parent means decoding a ton of baby symptoms, from a fever, to excessive crying to strange lumps and bumps. Is it a cold? The flu? Teething? Colic? Gas pain? The Bump is here to help! Try out our symptom finder to see what health conditions baby's symptoms could be signaling. And browse through a ton of articles on everything from baby allergies to yeast diaper rash. Find out what causes any common baby health condition, how to prevent it and how to treat it if baby gets it. We've got a ton of advice and tips from medical experts and from moms and dads who've been through it. So whether it's just a cold, or a sign of asthma, get the scoop on all baby and toddler symptoms and conditions right here at The Bump.

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Heat Rash in Babies

We’ve got the scoop on how to tell whether baby’s got a heat rash -- and how to prevent it, even on hot summer days.

What is heat rash like for a baby?

Heat rash happens when the skin’s sweat glands are blocked. Because the glands can’t release sweat normally, little red bumps -- heat rash -- appear on the surface of the skin. Heat rash frequently occurs on babies’ necks and backs. It’s not at all harmful and rarely bothers the baby.

What are the symptoms of heat rash in babies?

Look for small, raised, red bumps, kind of like pimples.

Are there any tests for heat rash in babies?

Nope. No tests are necessary. Heat rash is diagnosed simply by appearance. If your baby develops red, raised bumps and it’s been hot out, he probably has heat rash.

How common is heat rash for babies?

Very common, especially in the summer months.

How did my baby get heat rash?

“Babies tend to get chubby and have a lot of fat folds,” says Katherine O’Connor, MD, a pediatric hospitalist at The Children’s Hospital at Montefiore in New York City. Sweat can accumulate in those areas and block the sweat glands, causing heat rash.

To make matters worse, new parents also tend to overdress babies because they worry about them getting cold. But overdressing baby can actually lead to overheating and heat rash. A good rule of thumb: Dress baby as you’d dress yourself for the weather. And stick to cotton clothing in hot weather, because cotton wicks moisture away from the skin.

What’s the best way to treat heat rash in babies?

Remove some of his clothing and let his skin breathe. Keeping the area clean, cool and dry will help clear up the heat rash.

Don’t apply any lotions or ointments to the rash. They might help in treating other rashes, but with heat rash, they only further block the sweat glands and may actually make the heat rash worse.

What can I do to prevent my baby from getting heat rash?

“Keep your baby’s neck and back dry and free of sweat,” O’Connor says. “You can even apply some cornstarch powder to those areas; it tends to help keep things a little dryer and helps reduce heat rash quite a bit.”

What do other moms do when their babies have heat rash?

“We usually just wipe the area clean with a wet cloth and put some diaper cream on it. It goes away the next day. It also helps to air it out every time you do a diaper change. We use a blow-dryer on the cool setting to air it out for about 30 seconds.”

“My son gets heat rash on the back of his head and neck. When I notice it acting up, I just put a cold, wet washcloth on the area for a few minutes, and that seems to clear it up pretty quickly. He primarily gets it when he wakes up from his nap -- he takes after me and sweats in his sleep.”

“My son had it really badly at one point. The pediatrician's instructions were to give him oatmeal baths, don’t use soap, dress baby in just diapers as much as possible (even at night), run a humidifier in the room to moisten the air and use Eucerin Calming Creme Daily Moisturizer. Worked wonders.”

Are there any other resources for heat rash in babies?

American Academy of Pediatrics’ HealthyChildren.org

The Bump expert: Katherine O’Connor, MD, a pediatric hospitalist at The Children’s Hospital at Montefiore in New York City

-- Jennifer L.W. Fink

See More: Baby Basics , Baby Doctor Visits , Newborn Basics , Toddler Basics

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Reminder: Medical info on The Bump is FYI only and doesn't replace a visit to a medical professional.