Many children with chickenpox are sick with headache, fever, stomach ache, and also a loss of appetite, for a day or two before breaking out in the chickenpox rash, and these symptoms usually last for 2 to 4 days after breaking out.  

The average child will develop 250 to 500 small, itchy, fluid-filled blisters over red spots on the skin.  The blisters often appear first on the face, torso, or scalp and spread from there to the arms and legs.  Blisters on the scalp are found in approximately 80% of cases. This clinches the diagnosis.

 After a day or two, the blisters become cloudy and then become sores which develop a scab.  At the same time, new crops of blisters continue to develop.

 Chickenpox often appears in the mouth, in the vagina, and on the eyelids.

 Children suffering from other skin problems, such as eczema, may get more than 1,500 chickenpox blisters.

 In most cases, chickenpox will not leave scars unless they become contaminated with bacteria from scratching.