Pimples leaving scars that don't heal. how to fix this?

Many options: There are many different ways to try to improve the appearance of scars. The best place to start is with a consultation with a dermatologist or plastic surgeon who can review the expected results with skin care, resurfacing procedures, injections or surgical techniques. Unfortunately this is often a difficult problem and you need to go in with the expectation of improvement, not perfection.

Leave alone: The best way to deal with acne scarring is to not squeeze or traumatize the pimples. This is hard to do but they will do much less scarring. Once scarring has occurred they may lessen if you leave them alone. There are dermatologic treatments like dermabrasion and scar release for those that dont go away.