For the scars which are on the surface, you can try topical treatment like hydroquinone, azelaic acid, corticosteroids and tretinoin cream. Please discuss these options with your dermatologist before using them. For the deep crater like scars, you can go in for chemical peeling or laser resurfacing.
Hope it helps. Take care and please do keep me posted on how you are doing or in case you have any additional doubts. Kind regards.