Acne Scars form at the site of an injury. Acne Scars are the visible reminders of injury and tissue repair. In the case of acne, the injury is caused by the body’s inflammatory response to sebum, bacteria and dead cells in the plugged sebaceous follicle. Two types of true scars exist:

• Depressed areas such as ice-pick scars, and
• Raised thickened tissue such as keloids.