Acne pimples, or depressed scarring left after acne heals, usually stabilize their appearance in about six months. Whether or not a depressed scar will repair itself is directly related to the size and depth of the scar, and whether or not it is co-infected. Whether acne pits will repair themselves is related to the following factors; 1. the size and depth of the depressed scar: if the depressed scar is large and heavy, the possibility of self-repair is relatively small, while the acne pits are smaller and shallower can be repaired on their own and do not need special treatment. 2. Infection: accidental infection in the process of scar repair, the possibility of self-repair is significantly reduced; the need for topical drugs, such as topical rubbing metronidazole gel, clindamycin gel, etc. to control the infection, to reduce the possibility of aggravation of depressed keloid scars. 3. Nursing care: if long-term repeated squeezing, scratching, stimulation of the scar, the possibility of its self-repair will also be reduced, and it will take a longer time, perhaps not be able to repair itself, you can use photoelectric treatment to improve, but also the use of hyaluronic acid, collagen to fill the depressions. If the depressed scar can not be repaired on its own, it is recommended to go to the regular hospital in time for treatment, and not blindly use medication on its own.