Linear keloid scars are linear keloid scars produced after the healing of acute trauma or surgical incisions. The hyperplasia is more obvious 0-6 months after surgery, and then gradually softens to form grayish, flatter and softer linear scar tissue. In a few cases, scar hyperplasia occurs and a thick strip-like scar appears. Prevention: 1. Clear the wound promptly after trauma, remove necrotic and contaminated tissues as much as possible, trim the traumatic tissue to normal skin, suture in layers, and fully de-tension the parts with high tension. 2.Early removal of stitches: after removal of stitches, use biological glue external application or hypotension tape for hypotension to avoid leaving centipede foot-like scar. 3. Early and continuous tension reduction measures to prevent scar proliferation and widening. 4.Drug injection: apply scar softening drugs such as tretinoin and depo pone to inhibit scar proliferation. 5. Early treatment with silicone products after wound healing to promote scar maturation. For example: silicone film and silicone gel. Treatment: 1.Surgical reshaping: Z reshaping, W reshaping, etc. Pay attention to the reduction suture and precise alignment of dermis and epidermis during surgery. 2, laser or radiofrequency treatment: the use of laser, radiofrequency, grinding and other treatment methods to further improve. Such as: CO2 fractional laser, microdermabrasion, micro plasma RF, etc. 3.Anti-scarring medication: such as cumene cream, Conrad, Shukatsu, Bark, etc. 4.Silicone products: scar stickers, scar enemy, Mepi, etc.