Scars, or keloids, cannot be completely eliminated once they appear. Scar remedies are only effective for proliferative scarring, but not for old scarring. Scars are formed during the healing process of human tissues after trauma, burns or surgery. Currently, commonly used scar removal creams include silicone gel and allantoin gel, which can inhibit scar proliferation through various mechanisms. Generally speaking, the scar proliferation period is about 3-6 months after the healing of the skin injury, and the scar proliferation period will be longer if the damaged parts are earlobes, forehead and other special parts or keloid body. Only when the scar proliferation period of reasonable use of scar removal cream, only through the early inhibition of scar proliferation to achieve the effect of improving the appearance of the scar, the specific effect of individual differences. Scar removal creams are not effective for old scars, and once a scar appears, it cannot be completely eliminated. A variety of measures can only improve the poor appearance of the scar. It is recommended that patients who wish to seek treatment should go to a regular hospital to be evaluated by a specialized doctor for the specific condition of the scar, and then follow the instructions to choose the appropriate treatment plan.