There are many reasons for scars, which may be caused by trauma, postoperative, burns, or even infection, acne or acne. Scar is normal connective fiber tissue after wound healing. Generally speaking, most superficial scars will fade naturally within six months to one year, and can even be eliminated by external use of scar-removing ointment for several months. If it is a deep scar, it must be solved by other surgical treatments. For example, convex scar can be improved or corrected by dermabrasion, steroid injection, or cutting and sewing, laser electrotherapy, silicone paste and other methods; If it is a sunken scar, it can be filled by injection, such as collagen, hyaluronic acid or fat, or laser phototherapy. It is recommended to discuss with plastic surgeons before proceeding.