How can i most quickly cure chickenpox?

No cure: There is no cure---the course can be shortened if anti-viral meds are started early in the course.

Heals on it's own: Chickenpox will erupt over a 4-6 day period and form blisters that eventually dry & crust. Your best method of aiding recovery is keeping the skin clean, monitoring for signs of bacterial infection & supporting the kids physical needs. Good hydration & rest will help the body do its own repair work. I don't believe that any particular lotion helps, though aveno baths cut the itching..