Acne pits and hollows on the face are usually depressed scars that remain after acne heals. Once the scarring occurs, it is unlikely to go away, but there are some things that can be done to improve its appearance. Acne is a chronic inflammation of the sebaceous glands of the face. If the infection is extensive, the acne may leave some atrophic, depressed scarring after it subsides. If the lesions are locally red and still itchy in the early stages of healing, topical epidermal growth factor gel can be used to promote the regeneration of local collagen fibers in the skin, so that the scar depressions will gradually fade and flatten. If the old acne pits and more obvious, can not be improved by drugs, fractional laser and other photoelectric treatment repair, through the start of the skin damage re-repair process to stimulate the depression of local collagen regeneration and rearrangement, so as to improve the appearance of the depression of the scar, can play a very good therapeutic effect. If the scope of depressed scarring is relatively large, local filler injections, such as filler hyaluronic acid, collagen, etc., can also be used to repair such large depressions. It is recommended that patients who wish to undergo treatment visit a regular medical institution and follow the advice of a specialist to choose the appropriate treatment plan.