Facial skin with fractional laser treatment, swelling phenomenon, generally considered as a normal reaction after treatment, but also does not exclude a local skin infection there. Fractional laser is through the photothermal effect on the skin to play a uniform microporous, gasification exfoliation epidermis, start skin repair, stimulate the local collagen regeneration to achieve the role of spot removal, lighten the fine lines and so on. 1. Normal reaction: Fractional laser treatment is invasive treatment, and there are several thermal damage micropores in the skin after treatment. Generally within a week after treatment, local skin may appear swelling phenomenon, generally through cold compress treatment, the symptoms can be improved. 2. Skin infection: after fractional laser treatment, local skin in the case of improper care, may induce infection, so that the skin redness, swelling, and may even be accompanied by inflammatory exudate, this situation needs to be given to anti-inflammatory drug treatment, such as mupirocin cream, erythromycin ointment and so on. Due to the different physical characteristics of individuals, as well as clinical manifestations will have certain differences, so the occurrence of facial swelling should be timely to the regular medical institutions, in accordance with the advice of specialized doctors standardized treatment.