Laser acne pimple removal, i.e. laser improvement of acne depressed scar. Laser pimple removal mainly utilizes the photothermal action of the laser to peel off the sharp edges of the depressed scar, stimulate collagen regeneration and rearrangement of the depressed area, in order to improve the appearance of the scar. Its side effects can be pain, hyperpigmentation, infection, scarring and so on. 1. Pain: Most of the lasers used in the treatment of depressed keloid scars are peeling lasers, which are invasive, so the treatment process will be painful to a certain extent. 2. Skin pigmentation: laser treatment will briefly stimulate the epidermal melanocytes to synthesize melanin, and then melanin will be transferred to the surrounding keratinocytes, which will be manifested as pigmentation; improper post-treatment care is also likely to lead to pigmentation. It is generally recommended to moisturize and hydrate after treatment, strict sunscreen, scientific care in general about 3-6 months will be restored to natural. 3. Infection, scar: If the doctor is not strictly sterilized during the laser treatment or the patient is not properly cared for after the operation, the problem of infection is likely to occur; after the infection of untimely treatment or blind medication, delayed healing of the wound will have the possibility of scar formation. In addition, it is recommended that patients go to regular hospitals to do laser acne pits to avoid adverse consequences.