I have had chickenpox when is was 10 years old,it left me with black spots on my body especially on my legs.and now I am 21 years and I still have this spots they won't go away.

I would suggest going to a dermatologist for help. They may be able to prescribe some creams to help fade the spots.

Also, Meladerm has helped me fade some dark scars on my legs. I don't know if would help your condition but may be worth a try. It takes weeks for the spots to completely fade but they will.