They form a depression or sunken area because of damage to the collagen, fat or other tissues below the
skin. In such scars, apart from plastic surgery,
laser resurfacing is also helpful. They can be safely and effectively resurfaced through the proper use of a high-energy, pulsed or scanned carbon dioxide (CO2) or Erbium-Yttrium-Aluminum-Garnet (Er:YAG) laser.