Chickenpox in Infants: What You Need to Know

Team Peanut5 months ago7 min read

Chickenpox in infants: the bane of many a baby’s (and mama’s) life. When your little one is covered with hundreds of itchy red bumps, fun is well and truly off the table.

Chickenpox in Infants

The good news, however, is this super-infectious viral illness just isn’t as common as it used to be. In the US, chickenpox case numbers have plummeted since the launch of a vaccine in 1995.

And if your baby does get chickenpox, they’ll likely be all better in a few short days. But it’s still best to seek your pediatrician’s advice — for younger babies, chickenpox can sometimes be more serious.

In this article, we take a look at symptoms, treatments, and all your FAQs about infant chickenpox.

In this article: 📝

  • What causes chickenpox in infants?
  • Symptoms of chickenpox in infants
  • Is it safe for a baby to get chickenpox?
  • What is the treatment for chickenpox in babies?
  • Chickenpox in infants: FAQs

What causes chickenpox in infants?

Chickenpox is passed on through a virus called varicella-zoster. So your baby could catch it if they have contact with another baby, kid, or adult with chickenpox. That might be through touching the person’s saliva, mucus, or blisters (the itchy red spots). The virus can also travel through the air via coughs or sneezes.

Babies can’t be vaccinated against chickenpox until they’re one year old. But the good news is, they’re still protected by “herd immunity”. In other words, if a lot of people around them have had the vaccine (or are immune, because they’ve already had the illness), they’re less likely to catch chickenpox.

If your baby is a newborn or has a weakened immune system (where their body can’t fight off illness so well), it’s important to keep them away from someone infected with chickenpox. That’s because the illness could affect them more severely.

Symptoms of chickenpox in infants

About one to two days before the distinctive rash appears, there are some early signs of chickenpox in infants that you might spot:

First signs of chickenpox

  • A fever (a temperature of 100.4 degrees Fahrenheit or over)
  • Coughing
  • Fussing and crying more than usual
  • Not feeding well
  • Being tired or sleeping more than normal

Chickenpox rash

The chickenpox rash will generally show up on your baby’s chest, scalp, and face first. Then it spreads to the rest of their body. You could see up to 500 itchy red bumps — but it might be a lot less if it’s just a mild case. Babies who already have a skin condition, like eczema, can get a more severe rash.

The rash actually comes in waves over two to four days. Here’s what happens:

  • Tiny red spots appear
  • They fill with fluid to become blisters
  • The blisters break and leak
  • They begin to scab over and heal

Because there are usually several waves of the rash, you could see all these different phases on your baby’s body at once — spots, blisters, and scabs.

But don’t worry: in most cases the rash will heal up nicely, leaving no scars.

Chickenpox symptoms in babies can last for five to 10 days. And it’s important to keep your little one at home until they’re no longer infectious. That’s about 10 days after the first symptoms appeared, once the scabs have dried up.

Is it safe for a baby to get chickenpox?

Chickenpox is usually a mild illness. While your poor baby might be uncomfortable for a few days, they won’t usually have severe symptoms. And most kids will become immune to the infection once they’ve had it.

That said, you should let your pediatrician know if you suspect chickenpox, even if it seems mild. And tell them if you see any of the following symptoms (which could suggest a more serious illness):

  • A rash that’s very red, tender, and warm to touch
  • A rash that’s spread to your baby’s eyes
  • A fever of over 102 degrees Fahrenheit, or which lasts more than 4 days
  • Your baby isn’t waking up or seems extremely drowsy
  • Trouble breathing or a fast heartbeat
  • A severe cough, vomiting, or a stiff neck

Also, it’s best to check in with your doctor if:

  • Your baby is less than one year old
  • They have eczema, asthma, or a weakened immune system
  • You have another baby of less than six months old at home or any adults or kids with a weakened immune system (where chickenpox could affect them more severely if they catch it)

Chickenpox complications

In rare cases, chickenpox can lead to complications (that is, other medical issues). This may be more likely if your baby doesn’t have what’s called “passive immunity”. That’s where they pick up some resistance to chickenpox through you if you had chickenpox — or the chickenpox vaccine — before your pregnancy.

Without passive immunity, babies with chickenpox have a higher risk of developing:

  • Sepsis (a blood infection)
  • A bacterial infection, such as strep throat
  • Pneumonia
  • Encephalitis (inflammation of the brain)
  • Dehydration

So if you haven’t had chickenpox or the chickenpox vaccine yourself, and your baby catches the illness, it’s important to seek medical advice as soon as you can.

What is the treatment for chickenpox in babies?

Chickenpox usually gets better on its own in five to 10 days. Until it does, here are a few things you can do to make your baby more comfortable:

  • Bathe them in a lukewarm oatmeal bath, and pat (don’t rub) them dry afterward. This will help reduce itching.
  • Apply calamine lotion to the itchy spots.
  • Keep them hydrated (only with milk if they’re under six months old).
  • Dress them in loose-fitting clothes (or just a diaper, if they’re happier like that).
  • **Trim their nails ** or pop on a pair of mittens to help stop them scratching the spots.
  • **Ask your doctor ** about baby-safe medicine for pain, fever, and itchiness.

Important: Never give a baby (or a child under 18 years old) aspirin when they have chickenpox. This can lead to a serious illness called Reye’s syndrome.

Other treatments for chickenpox

Babies with chickenpox can sometimes get a bacterial infection around their blisters if they scratch them too much. Your doctor might prescribe a course of antibiotics to help clear this up.

If your baby is at risk of complications from chickenpox (see above), they might get an antiviral medication to help make their symptoms less severe.

Chickenpox in infants: FAQs

Let’s finish with a few of your FAQs about infant chickenpox:

  • Can a 6-month-old get chickenpox? Yes, a baby of any age can get chickenpox, but it’s less common in the US now that more people are vaccinated.

  • What happens if a newborn gets chickenpox? If a newborn catches chickenpox from their mama during birth or just after, it can lead to a serious illness. Having the vaccine before getting pregnant can help prevent this (if you’re not already immune).

  • When do infants get the chickenpox vaccine? Babies can have their first dose of the chickenpox vaccine when they’re 12 to 15 months old. They then get a top-up dose at four to six years old. The vaccine is over 90% effective after two doses, so hopefully more and more babies and kids are going to be ditching the itch in the years ahead.