It is inevitable that various scars will be left in life due to trauma, surgery, acne, etc. So how to solve this scar? Today, we will introduce you a laser: fractional laser. Fractional laser is a laser beam (dots) with a diameter of less than 500μm arranged in a regular pattern of dots and excited. Such a laser working mode is the fractional laser. The principle of action of fractional laser: it is through the fractional laser to produce array-like arrangement of tiny beams, after acting on the skin to form a number of three-dimensional columnar structure of tiny thermal damage areas, each tiny damage area is surrounded by undamaged normal tissue, its keratinocytes can quickly crawl, so that they quickly heal. It can make the collagen fibers and elastic fibers proliferate and rearrange, so that the content of type I and III collagen fibers is close to the normal ratio, so that the structure of pathological scar tissue is changed, gradually softened and restored elasticity. The main absorbing group of fractional laser is water, which happens to be the main component of the skin. It can make the dermal collagen fibers contracted and denatured by heating, and induce the trauma healing reaction in the dermis to produce orderly deposition of collagen and promote collagen proliferation, thus improving skin elasticity and reducing scarring. Fractional laser can form a burning area in the epidermis consisting of laser action dots and intervals, each laser action dot consists of a single or several high energy laser pulses, which can directly penetrate into the dermis and vaporize the tissue at the wrinkle or scar in an instant. At the same time, it stimulates collagen production to achieve the effect of treatment. During the treatment process, it produces a matrix arrangement of micro-thermal damage, so that the skin of the patient’s surface layer is regenerated and rebuilt, further making the patient’s acne scar pits disappear. Fractional Laser Role 2: Solving Stretch Marks and Swelling Lines Stretch marks are a worry for many mothers-to-be and postpartum mothers. Stretch marks usually appear under the umbilicus and pubic bone area of pregnant women, and are some light red or purple irregular cracks. These markings will gradually shrink and become silvery white after the pregnant woman gives birth, and eventually the skin becomes saggy. Fractional laser can be applied to very difficult stretch marks. By stimulating the skin tissues, the damaged skin can re-produce collagen and rearrange it so that the skin can be restored to a tender state, helping to reduce the appearance or extent of stretch marks. After a few sessions, it can make the stretch marks look less noticeable by lightening their color and narrowing their width significantly. Fractional laser action III. Treatment of painful burns and trauma-induced scarring Fractional laser treatment can be used for painful burns and trauma-induced scarring, and the itching and pain can generally improve 1-2 days after treatment. Clinical practice shows that the efficiency of fractional laser treatment for itching and pain of keloid scars reaches more than 90%, which is very effective.