Does laser freckle have scars?

Laser for freckle, its principle of action is to use the selective photothermal effect of laser, that is, the specific color group in the tissue selectively absorbs the laser after the temperature rises, and heat conduction occurs to the surrounding adjacent tissues. When the irradiation time of selective laser is shorter than or equal to the thermal relaxation time, it can lead to selective damage to the target, while the damage to normal tissues is small. In addition, there is a pulsed strong light, its principle of action is the same as laser, also using selective photothermal effect. Epidermal pigmented skin lesions, hemoglobin and water in blood vessels can absorb millisecond pulse width of intense pulse light, and converted into heat, can stimulate epidermal cells to accelerate differentiation, melanosomes also move up and fall off with keratinocytes, so that vascular endothelial cells occur thermal coagulation and vascular closure, and promote fibroblast synthesis and secretion of collagen fibers, so as to achieve the effect of removing pigment, sealing blood vessels, skin rejuvenation, etc. They are non-invasive, non-exfoliative cosmetic procedures, so treatment is generally scar-free.