Source:
Chickenpox Wikipedia
"Chickenpox infection tends to be milder the younger a child is and symptomatic treatment, with a little
sodium bicarbonate in baths or
antihistamine medication to ease itching, and
paracetamol (acetaminophen) to reduce fever, are widely used. Ibuprufen can also be used on advice of a doctor. There is no evidence to support the topical application of
calamine lotion, a topical barrier preparation containing zinc oxide in spite of its wide usage and excellent safety profile."
So, i hope that could help you.