The most noticable symptom are the spots, also called lesions or blisters. They start as a two to four millimeter red papule which develops an irregular outline that looks like a rose petal. A thin-walled, clear vesicle (dew drop) develops on top of the area of redness. This "dew drop on a rose petal" lesion is very characteristic of chickenpox. After about 8 to 12 hours the fluid in the vesicle becomes cloudy and the vesicle breaks leaving a crust. New lesions crop up every day for several days.