Red raised scars after knee abrasion belong to scar hyperplasia, the treatment is mainly divided into drug therapy and laser irradiation therapy, cryotherapy, etc., specific introduction is as follows: 1. Drug therapy: mainly with some of the role of scar removal ointment external smear treatment, can be used according to the actual situation as prescribed by the doctor. Commonly used drugs are a variety of silicone gel, silicone ointment, scar cream and so on. 2. Laser irradiation treatment: laser irradiation treatment includes pulsed dye laser and fractional laser, which can be used for the treatment of traumatic scar, acting on the deep parts of the affected area, destroying the scar tissue. After treatment, avoid direct sunlight and pay attention to sun protection. 3. Cryotherapy: adapted to smaller scars, commonly used liquid nitrogen freezing to treat.