The effectiveness of laser treatment for scars is definite, but several treatments are usually required to achieve satisfactory results. Do you have scars that significantly affect your function? Do you have a condition like fingers that cannot be straightened or eyes that cannot be opened? After surgery has been performed to resolve the functional impairment, laser treatment can be used to further improve the appearance. Are your scars red and hard, with itching and pain? Is it still growing slowly? If your scars are in a significant proliferation phase, then a combination of radiation therapy and local injections are usually needed, not just laser. After the growth of scars is controlled, laser treatment can be performed. For the timing of scar treatment, the current trend is early laser intervention. Laser treatment of scars gives improvement in three main areas: first, improvement of pigmentation abnormalities of scars. Scars with hyperpigmentation, which are darker than normal, can be made lighter and lighter by laser treatment; scars with hypopigmentation, which are lighter than normal, can be gradually darkened by laser treatment by stimulating the pigment cells. However, generally hypopigmentation is more difficult to treat than hyperpigmentation, which means that it is more difficult to make light colors darker and relatively easy to make dark colors lighter. Second, to improve the flatness of scars. Scars commonly have an uneven appearance, and with the use of appropriate devices, depressed scars can be gradually improved and protruding thickened scars can be atrophied and flattened. Third, improve the texture of scars. Most scars are poorly elastic, stiff and thickened or have a weak texture. Laser treatment can gradually restore the elasticity of scars and make them soft and resilient. Overall, for scars that are not obviously hyperplastic, have no obvious dysfunction, or are no longer surgically treated, laser can help improve the appearance of scars that look obvious and gradually become less obvious.