Symptoms of Chickenpox

Chickenpox causes a red, itchy rash on the skin that usually appears first on the abdomen or back and face, and then spreads to almost everywhere else on the body, including the scalp, mouth, nose, ears, and genitals.

The rash begins as multiple small, red bumps that look like pimples or insect bites. They develop into thin-walled blisters filled with clear fluid, which becomes cloudy. The blister wall breaks, leaving open sores, which finally crust over to become dry, brown scabs.

Chickenpox blisters are usually less than a quarter of an inch wide, have a reddish base, and appear in bouts over 2 to 4 days. The rash may be more extensive or severe in kids who have skin disorders such as eczema.

Some children have a fever, abdominal pain, sore throat, headache, or a vague sick feeling a day or 2 before the rash appears. These symptoms may last for a few days, and fever stays in the range of 100?–102? Fahrenheit (37.7?–38.8? Celsius), though in rare cases may be higher. Younger kids often have milder symptoms and fewer blisters than older children or adults.

Typically, chickenpox is a mild illness, but can affect some infants, teens, adults, and people with weak immune systems more severely. Some people can develop serious bacterial infections involving the skin, lungs, bones, joints, and the brain (encephalitis). Even kids with normal immune systems can occasionally develop complications, most commonly a skin infection near the blisters.

Anyone who has had chickenpox (or the chickenpox vaccine) as a child is at risk for developing shingles later in life, and up to 20% do. After an infection, VZV can remain inactive in nerve cells near the spinal cord and reactivate later as shingles, which can cause tingling, itching, or pain followed by a rash with red bumps and blisters. Shingles is sometimes treated with antiviral drugs, steroids, and pain medications, and in May 2006 the Food and Drug Administration (FDA) approved a vaccine to prevent shingles in people 60 and older.