The rash of chickenpox usually starts on the stomach or back and can spread anywhere on the skin. The rash starts as small red bumps that become fluid-filled blisters. Eventually the blisters break open and become crusted over. Chickenpox is very contagious and is spread from person to person. If your child is exposed to chickenpox, you will know if he has gotten chickenpox in about 2 weeks.
Most people only get chickenpox once because they develop immunity to the varicella virus.
Benadryl liquid taken by mouth may help with itching, but remember that this medicine might also make your child more sleepy. Try to keep your child from scratching the rash. Scratching can cause the rash to become infected and can cause scarring. You may need to put socks on your child's hands to help prevent scratching. Rash in the mouth can be very painful.