by Rick Alan
Chickenpox is a virus that spreads easily to others. It creates a widespread, itchy rash. The infection can also cause serious complications in some people.
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Chickenpox is caused by the varicella-zoster virus (VZV). It spreads from person to person via:
It is contagious 1-2 days before the rash erupts. It remains contagious until all of the blisters have crusted. This takes five days. It is most contagious just after the rash has broken out.
A pregnant mother can transmit the virus to a fetus.
Factors that increase your chance of getting 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:
The doctor will ask about 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, treatment focuses on relieving the symptoms.
Note: Aspirin is not recommended for children or teens with a current or recent viral infection. This is because of the risk of Reye's syndrome. Ask your doctor which other medicines are safe for your child.
Antibiotics cannot cure infections caused by a virus. 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, such as:
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 very important if you have not been vaccinated against the infection.
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.
American Academy of Family Physicians
Centers for Disease Control and Prevention
College of Family Physicians of Canada
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10/14/2008 DynaMed's Systematic Literature Surveillance. Available at: http://dynamed.ebscohost.com/about/about-us : Macartney K, McIntryre P. Vaccines for post-exposure prophylaxis against varicella (chickenpox) in children and adults. Cochrane Database Syst Rev . 2008;(3):CD001833.
Last reviewed May 2013 by Michael Woods, MD
Last Updated: 5/11/2013