Subcision is a treatment used to correct a type of scar called a valley scar. A valley scar simply means there is a defect in the volume of the skin at the site of the scar. The goal of subcision is to improve this decreased volume.
Subcision treatment breaks up the bands that pull the scarred area down causing the depression in the skin. This also allows for the formation of new, healthier tissue.
The exact number of treatments is patient dependent, but you should expect multiple treatments for maximal results. Please be aware this treatment will improve your scars, not eliminate them.