Acne scars generally result from inflamed blemishes that are caused by engorged skin pores. Skin pores can swell up from excessive oil, bacteria and dead skin cells, causing a break in the follicle wall. Minor breaks in the follicle wall do not take as long to heal, but a major one can cause infected material to spill out into surrounding tissue to create deeper lesions. Your skin actually has its own self-repair technique for lesions. New collagen fibers are formed and attempt to repair them. Unfortunately, as we age, our bodies produce less and less collagen, making it harder for acne scars to fade. Even when our skin repairs itself, it does not look as pristine as that original dermal layer.