Hello,
Chicken pox scars are very tough to treat. Apply hydroquinone cream or creams containing vitamin E on the scars and it should go away in a few days to months. If it still persists then you can go in for laser treatment, photodermabrasion or microdermabrasion. Avoid picking, harsh scrubbing, and abrasive treatments unless prescribed by a dermatologist during this period.
I sincerely hope that helps. Take care and please do keep me posted on how you are doing or if you have any additional doubts. Kind regards.