When acne penetrates the skin deeply it can damage the top layer of skin and the tissue beneath it. As the acne lesions heal, the body tries to repair this damage. During the healing process the body naturally produces collagen, a substance that gives the skin it’s underlying support. If the body produces too little or too much collagen, you will see a scar. The type of scar depends on how much or how little collagen your body makes.
Depressed acne scars: Caused when the body produces too little collagen, depressions or pits form as the skin heals.
Raised acne scars: Caused when the body produces too much collagen during the healing process. When this happens, a person develops a raised acne scar.
There are many treatment options, which can significantly diminish depressed and raised acne scars.