Fractional laser includes exfoliative fractional laser and non-exfoliative fractional laser, exfoliative fractional laser can generally recover well in 7-15 days, non-exfoliative fractional laser can generally recover well in 3-6 months. 1. Exfoliative fractional laser: it is to cauterize and peel off the hyperplastic skin lesion or swelling, or to cause interstitial collagen proliferation through deep stimulation of laser, so that the atrophic scar will be flattened gradually. Generally speaking, after exfoliative fractional laser treatment, the lesion starts to crust in 3-7 days, and the skin recovers in 7-15 days after the crust falls off completely. 2. Non-exfoliative fractional laser: after treatment, patients will have new epidermis within 24 hours, but the internal collagen regeneration time is relatively long, it takes about 3 months or even longer. And the patient’s skin color will be temporarily bronzed, and the skin color will be deepened in 3 to 14 days, and then it will slowly become lighter and recover in 3 to 6 months. To summarize, the recovery time of fractional laser varies from person to person and is not fixed. And after the operation, it is necessary to prevent sunshine, light diet, external medical cold compresses to avoid aggravation of the condition, and it is recommended to consult the doctor for specific conditions and standardize the treatment under the doctor’s guidance.