Chickenpox is a virus that spreads easily to others. It creates an itchy rash. The infection can also cause serious complications in some people.
Chickenpox is caused by the varicella-zoster virus (VZV). It spreads from person to person through:
A pregnant mother can transmit the virus to a fetus.
Chickenpox is more common in children under 10 years old. Other factors that may increase your chance of chickenpox include:
Symptoms break out about 10-21 days after contact. They are more severe in adults than they are in children.
Initial symptoms include:
The rash appears within 1-2 days after the first symptoms. The rash:
You will be asked your symptoms and medical history. A physical exam will be done. Diagnosis is usually based on the rash and your age. Blood and lab tests to identify the virus are rarely needed.
Chickenpox is mild in most people. It will naturally run its course. In these cases,
focuses on relieving the symptoms.
It may be difficult to avoid scratching. Itchiness can be reduced with:
Note: Aspirin is not recommended for children with a current or recent viral infection. Check with your doctor before giving your child aspirin.
Antibiotics cannot cure infections caused by a virus. However, they may be given if the rash becomes infected with bacteria.
The course, severity, and duration of the infection may be reduced by antiviral medications.
They are often used in:
Varicella-zoster immune globulin is often given immediately after exposure. It is reserved for newborns and people with weak immune systems.
Avoid contact with anyone who has chickenpox. This is important if you have not been vaccinated against the infection.
varicella vaccine, or a combination vaccine called MMRV, is recommended for most children. MMRV protects against measles,
rubella, and varicella.
There is a catch-up schedule if your child has missed the routine injections.
Adults who have never had chickenpox or received the varicella vaccine should be vaccinated.
If you or your child has not been vaccinated, but are exposed to chickenpox, a vaccine given right away may help lessen the severity of the infection, or prevent the infection.
Centers for Disease Control and Prevention
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About Kids Health—The Hospital for Sick Children
College of Family Physicians of Canada
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Last reviewed May 2016 by David Horn, MD
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