Three main types of acne scar are classified:
- Ice pick scar: This type of scar has vertical depth and measures less than 2mm wide
- Rolling scar: This type of scar has shallow borders and measures 4 to 5 mm wide.
- Boxcar Scar: This type of scar has sharply demarcated borders and 1.5 to 4mm wide.
Acne is not only trouble itself. After it disappears, it can also leave scars behind.