At present, the laser technology is more mature, widely used in the field of dermatology and cosmetology, its treatment range is precise, the damage to the surrounding tissue is very small, but in the actual application process, there are certain side effects.1, facial redness, swelling, bleeding wounds: just after the laser treatment, there will usually be redness and swelling in the face, as well as bleeding and oozing from the trauma, through the cold compresses and topical ointment, medicinal solution, it can be quickly repaired; 2, wound infection: if the care is not proper, there is a certain chance of wound infection, should avoid wound water, keep the face clean and dry; 3, hypopigmentation, hyperpigmentation: usually a temporary change, about 3 months can be relieved on their own, you can supplement some vitamin C, vitamin E, eat more fresh fruits and vegetables, on the recovery of the benefits; 4, allergic reaction: some patients after laser treatment caused local Allergic reaction: some patients after laser treatment cause local allergic reaction, skin rash, causing itching, tingling, should follow the doctor’s instructions to use anti-allergic drugs; 5, scarring: usually associated with improper care, laser treatment wound scabs, the recovery period can not tear the scabs, should wait for the natural fall off, otherwise it is easy to leave scarring. After following the doctor’s instructions for care, will effectively reduce the possibility of scarring.