Dermatology hospital can do laser scar removal, and the cost is determined by the scar area. The principle of laser scar removal is to selectively treat scar parts by using colored light with different wavelengths. By controlling the laser wavelength, different tissues and different degrees of scars can be repaired without damaging skin tissue. When the laser is irradiated on the skin, it will penetrate into the subcutaneous tissue, and the scar tissue will change from particles to powder until it is absorbed and removed by cells, and then the scar will change from deep to shallow and from shallow to no.