Chickenpox (varicella) is much less common in the U.S. than it used to be, thanks to the chickenpox vaccine. If someone does get chickenpox, the infection and the rash it causes will go away without treatment. But chickenpox spreads easily from person to person, so a child who has the should stay home until the rash is completely crusted over.
Signs and Symptoms
red bumps that look like pimples or insect bites
a small clear blister that develops on top of the red bumps
similar sores in the mouth
dry crusted sores that form over the blisters
an itchy rash that usually begins on the belly, back, or face and spreads to the arms and legs and other areas