Hi..Thanks for your query.
i think you were a bit too early in trying to apply agents to lighten your scars
. Just after the chicken pox
,skin is usually sensitive and hence any procedure might make it worse.
i would advise you to use a medicated sunscreen to prevent any darkening of the existing scars.You can use mild lightening agent like kojic acid
containing creams twice daily on darker spots.As for the peeled patch,it is best to leave that alone till the melanocytes in the area regenerate the lost pigment .it might take 3-4 weeks for the same.But there is nothing to worry about.