Once acne is cured, there are red marks, brown pigmentation, and acne scarring. An acne scar refers to the surface of the skin that is depressed or raised around its normal skin after acne treatment. The scar is caused by a dent in the skin as part of the skin falls off while it is badly strained. If you touch or squeeze the acne incorrectly during the inflammatory stage, the scar will remain. Once you have a scar, it is hard to get rid of and it doesn’t look good.