Scars are marks which are created by surgical incisions, injuries or dermal diseases such as acne. There are puny scars which look the same as holes in the skin and hypertrophic scars that bulge. Stretchmarks are the red or white lines that are developed in spots where the skin extends during pregnancy and puberty or after the wrong use of cortisone.
A technique called fractional photo-thermolysis is used for the gradual improval of these aesthetic problems, is the most important part of Lasers that apply it. These lasers aim at fiber-blasts,as they promote the production of accumulated collagen and elastin(such as wrinkles).