hi - i am a licensed master esthetician (skin care therapist). first, the best way to prevent acne pits is to not extract at the wrong time...i.e. before there is a pustule. a pustule is the correct time to extract. insert a sterile needle in the pustule, wrap fingers w tissue, push down and up until there is clear blood. if you extract before - your skin will produce too much collagen in a desperate attemt to heal itself, therefore producing a "pit." if your scarring is severe i suggest treatment with a surgeon such as deep chemical peel, laser, or dermabrasion. if you have redness try maderma (over the counter). also, learn proper skincare to prevent future problems. good luck.