Chickenpox
Also called Varicella
- Typical age
- Any age (rare if vaccinated)
- Where
- face, chest, back, body
- Fever
- yes
- Itchy
- yes
- Contagious
- Yes
- Usually lasts
- 5–10 days
What it looks like
Itchy red spots that turn into fluid-filled blisters, then crust over, arriving in waves so you see all stages at once.
On brown and black skin, redness may look purple, grey or darker than surrounding skin; texture (raised, rough, blistered) is often the better clue.
What causes it
Varicella-zoster virus. Very contagious until all blisters have crusted. The vaccine is given at 12–15 months in the US.
What helps at home
- Calamine lotion, cool baths and short nails to limit scratching.
- Acetaminophen for fever. Do not give aspirin; avoid ibuprofen unless your doctor advises (NHS guidance).
- Keep home until all spots have crusted.
When to call about chickenpox
Call 911 or go to the ER now
- Trouble breathing, stiff neck, very drowsy or confused
- Rash that does not fade when you press a clear glass against it (possible petechiae or purpura)
- Baby under 3 months with a temperature of 100.4°F (38°C) or higher
Call your pediatrician today
- Under 12 months old
- Spots red, hot, swollen or painful (possible infection)
- Weakened immune system or pregnant contacts
General guidance based on AAP, NHS and CDC advice, not a diagnosis. If your gut says something is wrong, call your pediatrician or nurse line. You never need permission to seek care.
Questions parents ask
Can a vaccinated child get chickenpox?
Yes, but it is usually much milder with fewer spots. Two doses of vaccine give strong protection.
Rashes often confused with chickenpox
- Roseola · chest, back, tummy
- Heat rash · neck, chest, armpits
- Eczema · cheeks, scalp, elbows
- Erythema toxicum · chest, face, arms