Acne treatment has multiple stages - to control new breakouts, to clear the sequalae (pigmentation and scars) and to prevent a relapse. So if you have no new acne lesions, then acne scar treatment can be started. Now-a-days many chemical peels also offers realistic promise like salicylic acid which is done by a dermatologist. He may also consider lasers or dermabrasion based on type of scars.
Drak circles need to be evaluated and targeted specifically. Peels like glycolic acid and lactic acid
will help in lightening. Dermapen in combination with mesotherapy also helps.
You may need oral medications. Consult a skin specialist