Acne scars are one of the common complications of acne and greatly affect the patient’s appearance and psychology. There are a variety of treatments for acne scars that can greatly improve the appearance. The first step is to understand the pathogenesis of acne. Acne vulgaris is an inflammatory disease centered on sebaceous glandular units on the face, chest, and upper extremities. The currently recognized pathogenesis includes abnormal keratinization of the follicular opening, overproduction of sebaceous glands, elevated androgen levels, and Propionibacterium acnes infection. The inflammatory process occurs throughout the pathogenesis, from microcomedones – closed pimples – inflammatory papules – inflammatory erythema post-inflammatory hyperpigmented scars. Next, learn more about the classification of acne scars. Acne scars are categorized as atrophic, hyperplastic and keloidal. Abnormalities in collagen production and breakdown occur during the acne healing process, and dermal collagen destruction is present in 80-90% of patients. Atrophic scars are the most common of these, and are categorized into ice pick-like scars, boxcar-shaped scars, and milled scars based on the depth and size of the lesions, with multiple types of scars usually presenting in the same patient. Let’s look at how acne scars are typically treated. Laser, peeling and filler treatments are generally used. 1. Laser. In recent years, fractional lasers have been increasingly used to treat acne scars, and they fall into two main categories: peel and non-peel. Fractional lasers use monochromatic light to deliver thermal energy and stimulate skin fibroblasts to produce collagen and elastin fibers. Traditional exfoliative fractional lasers are effective, but with significant pain and a long recovery period. Non-exfoliative fractional lasers are relatively mildly painful but have a long course of treatment and are not as effective as exfoliative fractional lasers. The doctor can choose a more suitable laser for treatment according to the actual situation of the patient. 2, peeling plus laser repair Peeling in the subcutaneous fat layer to break the adhesion later, fresh blood to fill the cavity, autologous repair, and then with laser treatment of acne issued by the red, dark pigmentation, can achieve very good results. 3, filler repair depressed scars because depressed, the most direct method is to fill! The so-called lack of what to fill, especially for the dermis layer is not obvious adhesion, defects, only the amount of subcutaneous tissue is insufficient, we can be injected through hyaluronic acid, collagen and other implants to fill, make the depressed part of the bulge, so as to harmoniously articulate with the surrounding skin, restoration.