Acne scars do not go away entirely on their own. Depressed acne scars often become more noticeable with age as skin loses collagen.
Acne scars are the result of inflammation of acne blemishes. The acne pore swells and a breakdown occurs in the wall of the pore. Some acne blemishes are small and the scars created are shallow and heal quickly. Sometimes the contents of blemishes spill into the surrounding tissue and cause deeper scars.