Experts from Hefei One Plus One Plastic Surgery Hospital said that improvement of the skin of patients with scars treated with beam laser generally requires three treatments, with an interval of two to four weeks between each treatment. Seven days after treatment, the skin will become tighter, and the skin's texture, fine wrinkles, and scars will be improved. Like-beam laser treatment of scars does not cause pain, while avoiding any possible side effects of invasive lasers, such as hypopigmentation or hyperpigmentation, post-treatment infection, edema, erythema and edema. Hope my answer is helpful to you.