Old scars, i.e. old keloid scars, can be removed by medication, physical therapy, surgery, injection and filling. 1. Medication: patients with old scars can follow the doctor’s instructions to use silicone gel, compound heparin sodium allantoin gel and other drugs, which can effectively lighten and remove the scar. 2. Physical therapy: patients can choose the way of fractional laser to remove the scar, the use of laser to stimulate the regeneration of skin collagen, can make the cell tissue back to normal. 3. Surgical treatment: patients can also remove the scar directly through surgical procedures. After removing the scar, local radiotherapy is needed to prevent the scar from recurring. 4. Filler injection: For depressed scar, autologous fat, hyaluronic acid and other filler materials can be injected into the scar area, which has a better effect on depressed scar. There are more ways to remove old scar, we suggest patients to go to regular hospitals and choose the appropriate way to remove it under the guidance of doctors.