Although the modern laser is accurately positioned and acts only on the part to be treated, it still inevitably causes some damage to the surrounding normal skin, and the local skin needs about 1 month’s repair period after treatment, during which the following problems should be noted: 1. Hot water is forbidden in the treatment area within 36 hours after laser photon treatment, so as not to aggravate the local thermal damage. 2, after laser treatment, the treatment area will have local skin redness, purple, scab, scab removal process takes about 7 – 15 days, the scab film should be allowed to fall off on its own, do not use your hands to uncover or scratch, so as not to cause scarring. Hair removal does not have this process. 3, like a beam laser treatment after the external application of antimicrobial ointment 3 – 5 days, once a day, the treatment area before the removal of scabs do not contact with water, keep the local clean and dry, prevent infection, infection has the possibility of scar formation. Photon therapy patients can use water to rinse the treatment area on the same day, but should pay attention to the treatment area 36 hours after treatment without hot water, soap, shower gel, face wash, shampoo and so on. 4, the treatment area before and after treatment within 1 month should be strictly sunscreen (apply high index sunscreen, playing umbrella), so as not to cause hyperpigmentation. A very small number of patients after laser treatment, even if the sunscreen is done in place, local transient hyperpigmentation or hypopigmentation will occur, these transient pigmentation changes will gradually return to normal, the recovery time of about 1 to 3 months, individual up to 9 months or even longer. If necessary, oral vitamin C, vitamin E or topical hydroquinone cream, levitamin C and so on. 5, recovery period should not be strenuous exercise, so as to avoid too much sweating lead to skin infection or slow down the repair process. 6.Don’t eat spicy and stimulating food, tobacco and alcohol after laser/photon treatment.