Acne is a common inflammatory disorder of pilosebaceous unit. Acne often .begins at puberty with severity peaks at about 14-18years. It affects both sexes equally.
There are mainly three types of acne scars- ice pick scars, rolling scars and boxcar scar.Ice pick scars- narrow (<2mm), deep, well marginated rocket shaped scar where the base of the scar is on the skin surface and the tip lies at a depth.
Rolling scars-4-5mm wide scars occurring as a result of tethering of the dermis to the subcutis leading to a rolling or undulating appearance.
Boxcar scars- round to oval depressed scars with well demarcated vertical edges. They may be shallow or deep. Acne can also cause hypertrophic scars, keloidal scars, sinus tracts and non-specific scars of different shapes and variable depths.