Laser scar removal is effective. Scars are clinically known as keloid scars. Laser treatment is suitable for keloid scars with flat skin surface, as well as depressed keloid scars left after healing of chickenpox and acne, and keloid scars left after mild burns, etc. For different kinds of scars, it is necessary to follow medical advice to choose the appropriate treatment modality or treatment frequency: 1. Peel fractional laser treatment: CO2 laser, Er laser, etc. are the main treatment methods. Due to the epidermal vaporization given during the treatment, the healing rate is relatively slow and may be more prone to adverse reactions such as crusting, mild erythema, peeling, etc., but it can subside in about 7-14 days; 2. Non-exfoliative fractional laser treatment: Due to the relative abundance of water in the scar tissue, the non-exfoliative fractional laser treatment can be lightly absorbed when irradiating the skin and usually does not damage the epidermal stratum corneum, the epidermal tissue is coagulated but The epidermal tissue coagulates but does not vaporize, and the cooling process heats the dermis without damaging the epidermis, reducing complications while treating the scar. Laser treatment usually requires 2-3 sessions and may cause adverse reactions such as local pain, skin redness, edema, flaking or secondary skin infections, but most of them can be resolved in about 48-72 hours. Large doses or large areas of laser treatment may cause temporary hyperpigmentation and hyperplastic scarring, which may take several months to recover. In addition, patients need to follow the doctor’s instructions for certain care after treatment, such as avoiding spicy and irritating foods, not getting water on the treated area for a short period of time, and not picking with hands after crusting.