There are ablative lasers (ex. CO2), which create injuries through the skin and non-ablative which create heat columns (no blood). Each condition we are trying to treat is at a different depth in our skin. For example acne scars are very deep, while freckles are very superficial. These lasers create isolated thermal injury zones to get underneath the condition we are trying to treat; to correct, helps create new skin and stimulate collagen. Some popular brand names are Fraxel,Sciton,Palomar, Cutera, Clear + Brilliant, etc. Indications treated with lasers are acne scarring, surgical scarring, pigmentation, tone, texture, pore size, melasma, acintic keratosis and wrinkles.