Your child has strange spots on their belly, and you're wondering if it could be chickenpox? You're not alone. Chickenpox is one of the most common childhood illnesses, and most children get it at some point during their early years.

Although chickenpox is usually harmless in healthy children, it's important to know what to look for, how to ease the symptoms, and when to actually call the doctor. In this guide you'll find everything you need to know about chickenpox in children and babies — based on current guidelines from the AAP, CDC, and pediatric health organizations.

What Is Chickenpox?

Chickenpox (varicella) is a highly contagious viral illness caused by the varicella-zoster virus. The illness is characterized by an itchy rash with fluid-filled blisters, usually combined with a mild fever and general malaise.

Most children get chickenpox only once in their lifetime. After recovering, you typically have lifelong immunity. The virus doesn't disappear entirely from the body, though — it goes dormant in nerve cells along the spinal cord. In some people, the virus can reactivate later in life and cause shingles (herpes zoster).

Chickenpox is most common in children between 1 and 10 years old. The illness is usually mild to moderate in otherwise healthy children, and most recover within 7–10 days.

Chickenpox Symptoms in Children

Symptoms develop gradually and can vary from child to child. Here's the typical progression:

Early signs (1–2 days before the rash)

Mild fever (99–101°F / 37.5–38.5°C)
General tiredness and malaise
Headache
Reduced appetite
Sore throat or mild cold-like symptoms

The rash — how it develops

The rash is the most distinctive symptom of chickenpox. It develops in several stages:

Red spots — The rash starts as small, round red spots, often on the chest, belly, or back
Fluid-filled blisters — Within hours, the spots develop into small, clear, fluid-filled blisters (vesicles)
Crusting — After 1–2 days, the blisters dry out and form scabs
Scabs fall off — Scabs fall off after 5–7 days, usually without leaving scars

A hallmark of chickenpox is that you can see all stages at the same time — some spots are new and red, while others have already dried up and formed scabs.

The rash typically spreads from the torso (chest and back) to the face, scalp, and then out to the arms and legs. Some children have only a handful of blisters, while others can have several hundred.

Itch relief tip: The rash often itches intensely. Keep your child's nails short and have them sleep in long pajamas to prevent scratching at night. Scratching can lead to bacterial infection and scarring.

Incubation Period and Contagion

Incubation period

The incubation period for chickenpox is approximately 14 days (range: 10–21 days). This means it takes about two weeks from when your child is exposed to when the first symptoms appear.

How long is my child contagious?

Chickenpox is one of the most contagious childhood illnesses. Your child is contagious from 2 days before the rash appears until all blisters have crusted over — usually about 5 days after the rash started.

The virus spreads in two ways:

Airborne droplets — through coughing, sneezing, and breathing
Direct contact — touching the fluid inside the blisters

It's worth noting that your child is most contagious 1–2 days before the rash appears — before you even know they have chickenpox. This makes it very difficult to prevent spread entirely.

Daycare and school

Children with chickenpox should stay home from daycare and school until the rash has started to dry out. You don't need to wait until all scabs have fallen off, but no new blisters should be forming.

In practice, this means most children are home for 5–7 days after the rash first appears.

Notify others: Let your child's daycare or school know if they have chickenpox. This gives other parents a heads-up — especially important for families with children who have weakened immune systems, or for those who are pregnant.

Treating Chickenpox at Home

Chickenpox is a viral illness the body fights on its own. There's no cure, but there's a lot you can do to ease symptoms.

For fever and pain

Acetaminophen (Tylenol) can be given to reduce fever and relieve discomfort. Follow dosing instructions based on your child's weight.

Never give ibuprofen for chickenpox! Ibuprofen (Advil, Motrin) can in rare cases worsen chickenpox and increase the risk of serious skin infections. Children under 16 should also not be given aspirin for chickenpox (risk of Reye's syndrome).

For itching

Itching is often the most distressing part for your child. Here are some effective strategies:

Calamine lotion or anti-itch cream — calamine lotion is a classic remedy; ask your pharmacist for mild anti-itch options
Antihistamines — diphenhydramine (Benadryl) or cetirizine (Zyrtec) can help with itching, especially at night. Ask your pediatrician or pharmacist about dosing
Lukewarm baths — a lukewarm (not hot) bath can soothe itching. Avoid harsh soap; you can add colloidal oatmeal to the water for extra relief
Light, loose clothing — avoid warm, tight clothing that can irritate skin
Full pajamas at night — prevents scratching during sleep

General care

Make sure your child drinks plenty of fluids
Offer soft foods if your child has blisters in their mouth
Keep the room at a comfortable temperature — warmth makes itching worse
Distract your child with calm activities like books, drawing, or movies

Nighttime tip: Itching is often worst at night. A cool, damp cloth gently placed over the worst areas can provide relief. Combine with an antihistamine given about 30 minutes before bedtime.

When Should You Call the Doctor?

Most children with chickenpox don't need medical attention. But it's important to know the warning signs that require a professional evaluation.

Contact your doctor or go to urgent care if:

Your child is under 4 weeks old and has been exposed to chickenpox
Your child has a high fever above 103°F (39.5°C) lasting more than 3–4 days, or a fever that returns after going away
There are signs of skin infection around the blisters — redness, swelling, warmth, or pus
Your child is extremely lethargic, hard to wake, or not responding normally
Your child has difficulty breathing or worsening cough
Your child complains of severe headache or neck stiffness
Your child refuses to drink or shows signs of dehydration
Your child has a weakened immune system (due to illness or medications)
You are pregnant and have not had chickenpox before

Possible Complications

Although chickenpox is usually mild, complications can occur. The most common are:

Bacterial skin infection — the most frequent complication, occurring when bacteria enter through scratched blisters
Pneumonia — rare in children, more common in adults and teenagers
Encephalitis (brain inflammation) — very rare but serious, with symptoms including confusion, unsteadiness, and seizures

A significant proportion of children hospitalized with chickenpox were previously healthy. This underscores the importance of knowing the warning signs.

Chickenpox in Babies and Newborns

Infants and newborns are a special risk group when it comes to chickenpox.

Newborns (0–4 weeks)

Newborns exposed to chickenpox are particularly vulnerable to serious illness. The most dangerous scenario is when the mother develops chickenpox in the period from 4 days before to 5 days after birth. In this case, maternal antibodies haven't yet transferred to the baby, and the newborn can have a severe course of illness.

Newborns exposed to chickenpox should always be evaluated by a doctor and may need preventive treatment with immunoglobulin or an antiviral medication (acyclovir).

Babies under 12 months

Babies who are protected by maternal antibodies (if the mother has had chickenpox) have some protection in the first 3–6 months. After this, protection wanes.

Babies under 12 months who develop chickenpox should be seen by a doctor, as they may need closer monitoring.

For pregnant people: If you are pregnant and have not had chickenpox, avoid contact with anyone who has the illness. Contact your doctor immediately if you've been exposed. Chickenpox during pregnancy can in rare cases cause fetal complications.

Tips for Babies with Chickenpox

Dress your baby in loose, soft cotton clothing
Keep nails trimmed very short; consider cotton mittens
Keep the room slightly cooler than usual
Continue breastfeeding or formula; offer extra fluids
Monitor that your baby is producing enough wet diapers (at least 4–6 per day)

Vaccine Against Chickenpox

AAP and CDC recommendations

The varicella (chickenpox) vaccine is part of the recommended childhood immunization schedule in the United States and many other countries.

Recommended schedule:

Dose 1: 12–15 months
Dose 2: 4–6 years

How effective is the vaccine?

The chickenpox vaccine is highly protective:

One dose provides strong protection against moderate and severe chickenpox
Two doses provide even better protection and reduce the risk of breakthrough infection (mild chickenpox despite vaccination)
High vaccination coverage (around 90%) is needed to protect those who cannot be vaccinated

Side effects of the vaccine

Most side effects are mild and temporary:

Redness, pain, or swelling at the injection site
Mild fever
Muscle aches and headache
In rare cases, a mild chickenpox-like rash

Serious side effects are very rare. The vaccine has been in international use since the mid-1990s and has a well-documented safety profile.

For those who haven't been vaccinated: If your older child or you yourself have never had chickenpox or been vaccinated, ask your pediatrician or doctor about catch-up vaccination. It's not too late to get protected.

Can the vaccine be given privately?

If your child's next scheduled dose is some time away, talk to your pediatrician if you have concerns about your child's protection. They can advise on timing and any catch-up doses needed.

Frequently Asked Questions

Can you get chickenpox more than once?

Almost never. After having chickenpox, you have lifelong immunity. In very rare cases, people with weakened immune systems may get chickenpox again.

What is the connection between chickenpox and shingles?

After you've had chickenpox, the varicella-zoster virus stays dormant in nerve cells in your body. In some people — usually older adults or those with weakened immune systems — the virus can reactivate and cause shingles. Shingles causes a painful, blister-like rash, usually on one side of the body.

Can adults get chickenpox?

Yes. Adults who have never had chickenpox can be infected. Chickenpox in adults and teenagers is often more severe, with higher fever and greater risk of complications such as pneumonia.

Should siblings be kept away?

In practice, it's very difficult to prevent spread between siblings, since the child is contagious before the rash even appears. Up to 90% of susceptible household members become infected. Many parents accept spread between siblings, since the illness is usually mild in healthy children.

How long should my child stay home from daycare?

Your child should stay home until the rash has started to crust over — usually 5–7 days after the first blisters appeared. No new blisters should be forming before your child can return.

Can my child bathe with chickenpox?

Yes. Lukewarm baths can actually relieve itching. Avoid hot water and harsh soap. Pat the skin dry gently afterward — don't rub.

Summary

Chickenpox is a common and usually harmless childhood illness that most children recover from quickly. The most important things you can do are ease the itching, give acetaminophen for fever (never ibuprofen), and know the warning signs that require medical evaluation.

Remember that newborns, babies, pregnant people, and those with weakened immune systems are high-risk groups who should see a doctor if exposed to chickenpox.

With routine vaccination now widely available, the best long-term protection is keeping your child's immunizations up to date.

Sources

CDC. "Chickenpox (Varicella)." cdc.gov
American Academy of Pediatrics. "Chickenpox." healthychildren.org
WHO. "Varicella and herpes zoster vaccines." who.int

Chickenpox in Children: Symptoms, Treatment, and Contagion