Although chickenpox often clears up on its own, it can cause serious symptoms in babies, especially newborns. Therefore, unvaccinated babies should not be in close proximity to people with the virus.
The telltale sign of chickenpox is a crusty, itchy rash. The rash is red, and it usually starts on the face, neck, or chest before spreading to other areas of the body. The rash starts with fluid filled blisters, which crust over within 4–10 days.
If an infant scratches the blisters, they may ooze or become infected.
Some other signs and symptoms of chickenpox in babies include:
- loss of appetite, including changes in breastfeeding habits
- changes in sleep habits because the baby is itching or in pain
- excessive crying or a lack of response to efforts to soothe the baby
- fever, which can sometimes start before the rash
- increased sleepiness
Newborns with chickenpox may not have a fever because they have a less developed immune system, and, therefore, their body does not always respond to infection by raising its temperature.
Parents and caregivers should consult a doctor if a baby under 3 months of age shows signs of chickenpox or develops a fever.
Treatments and home remedies
In most children, chickenpox symptoms clear up on their own within about a week. Treatment focuses instead on managing symptoms. The following home remedies may provide relief:
- Giving the baby a warm bath with uncooked oatmeal.
- Applying calamine lotion to itchy spots.
- Dressing the baby in loose fitting clothes that do not irritate blisters. Some babies may be more comfortable in just a diaper.
- Preventing babies from scratching the blisters. Newborn mittens can help.
- Keeping the baby’s nails clean and short to reduce the risk of infection from scratching the blisters.
- Asking a doctor about over-the-counter medication for fever and pain. Do not give these drugs to a child below the age of 2 years without first consulting a doctor. Avoid medications containing aspirin. There is some concern that the use of ibuprofen during chickenpox infection may cause serious skin infections in some babies, so ask a doctor about alternative medications.
If symptoms are very severe, or a baby has a higher risk of complications from chickenpox, a doctor may prescribe an antiviral medication. These drugs can help the baby’s body fight the infection and may reduce the severity and duration of symptoms.
In some cases, a doctor may recommend other treatments to address chickenpox complications. For example, a baby with dehydration from a high fever and inadequate liquid intake might need to receive intravenous fluids in a hospital.
The varicella-zoster virus causes chickenpox. Once a person gets the virus, they are typically immune to future infections.
Very rarely, a person with a weakened immune system may get a second infection. It is also possible for the virus to reactivate, but in most cases, reactivation of the virus causes shingles rather than chickenpox.
Is it contagious?
Chickenpox is highly contagious in people who have active infections.
Chickenpox lives in the respiratory tract and eyes. It is highly contagious in people who have active infections and in cases of recent exposure. A person who is not immune can get chickenpox if they come into contact with mucus, saliva, or other bodily fluids from a person with the infection.
For this reason, people with chickenpox should avoid contact with babies under the age of 1 year or older children whom healthcare professionals have not immunized against chickenpox.
People living in close quarters are particularly vulnerable, as are unvaccinated children in preschools and daycare centers. A pregnant woman with chickenpox can also transmit the virus to her newborn.
After a person who is susceptible to chickenpox comes into contact with the virus, the virus lives in their body for 10–21 days before they get sick and more obvious symptoms show. People with weak immune systems, such as newborns and those living with HIV, may have slightly longer incubation periods.
Most babies recover from chickenpox within a week, and some may even improve within a few days. However, those with very severe infections may require 2 weeks or longer to return to health.
Most people, even babies, heal from chickenpox without additional treatment. Complications are rare, but when they do occur, they can become serious. Possible complications include:
- secondary skin infections, especially if a baby picks at a blister
- damage to organs, such as the liver
- low blood platelet count
- complications from a fever, such as dehydration or seizures
- brain inflammation, called encephalitis
When to see a doctor
Parents and caregivers should call a doctor about chickenpox in a baby if:
- the baby is less than 1 year old
- the baby has a condition that weakens the immune system
- chickenpox does not disappear within a week
- the infection seems very serious, or the baby is inconsolable
- a fever lasts longer than 4 days or rises above 102ºF
- the rash becomes swollen, red, warm, or tender
Women who develop chickenpox when pregnant should also speak to a doctor.
It is important to go to the emergency room if the baby:
- has trouble moving or seems confused
- repeatedly vomits
- has a severe cough or is experiencing difficulty breathing
- has a rash that bruises or bleeds
- has a stiff neck or has trouble moving their head
- is very sick, and a doctor or medical professional is not available to contact
A parent or caregiver can discuss vaccination with a doctor.
The Centers for Disease Control and Prevention (CDC) recommend vaccinating babies at both 12–15 months and 4–6 years of age. A parent or caregiver who misses this vaccine schedule can still catch up and vaccinate their child.
Vaccinations can stop the spread of chickenpox and virtually eliminate the child’s risk of developing the disease. If a vaccinated child does get chickenpox, which is very uncommon, the infection is often less severe.
Some other strategies to prevent chickenpox in babies include washing children’s hands before they eat and after they play, especially if they have been playing with other children, and avoiding people with recent exposure to chickenpox.
Women who wish to try getting pregnant can ask a doctor about getting their vaccines beforehand. Healthcare professionals cannot give the chickenpox vaccine during pregnancy.
For most babies, chickenpox is mild and clears up on its own. However, it is important to be aware that chickenpox in babies is occasionally dangerous and can cause severe symptoms.
Vaccination remains the best strategy for reducing the risk of chickenpox in babies and young children. As babies under the age of 1 year do not receive a vaccine against chickenpox, the safest practice is for everyone else around them to get the vaccine. Parents and caregivers can discuss prevention and safety strategies with a healthcare professional.
If a person has concerns about a baby with chickenpox, they should contact a doctor or pediatrician for advice.