Regression of hemangiomas does not mean that they disappear. hemangiomas can be simply divided into 2 categories: regressive and non-regressive. 30% regress at age 3, 50% at age 5, 70% at age 7, and 90% at age 9, but these figures are only estimates. Of course, regression rates reported in the literature vary, and the likelihood of regression of hemangiomas is mostly speculative. With multiple hemangiomas, the rate of regression varies with each lesion. More importantly, it is not possible to predict whether hemangiomas will regress and whether they will cause aesthetic problems after regression. Most reports indicate that nearly 50% of hemangiomas result in permanent deformities. Parents should understand that involute does not mean disappearance. Lasers are not magic Parents of children with hemangiomas always hope for immediate removal of the lesion and have high hopes for laser treatment. It is important to understand that the average penetration depth of a pulsed dye laser is 1.2 mm, but it is often used to treat hemangiomas up to 10 times its thickness. Subliminally separated skin that is treated with the laser usually results in marginal necrosis. Parents should be encouraged to use laser treatment as the definitive treatment for residual capillary dilation, especially in nasal and lip lesions. The pulsed dye laser (PDL) is the standard laser for the treatment of vascular lesions and is primarily used for early intervention of superficial hemangiomas, management of ulcerated lesions, and treatment of residual capillary dilatation during the regression phase. The 595 nm long pulsed dye laser with skin cooling system has superior efficacy to conventional 585 nm PDL. low energy PDL irradiation of superficial hemangioma ulcers accelerates wound healing. pdl and long pdl are safe and effective for capillary dilation. Laser treatment should not be used as a routine treatment for hemangiomas because topical β-blockers such as timolol solution or gel also have good efficacy and safety for superficial hemangiomas. It is generally accepted that laser is not very useful in prodromal hemangiomas: laser treatment does not stop hemangioma growth and can cause ulceration. In addition, laser-treated skin is three times more likely to undergo atrophy and depigmentation than untreated skin that has faded. Timing of surgery and laser treatment The child should not be operated before the age of 1 year except in certain cases (life-threatening or important functions). It is generally recommended that the procedure be performed before the age of 1 year to remove residual lesions such as scarring, skin depressions, excess skin, and fibrofatty residue during the regression period or after treatment, and to reduce the psychological burden on the child and parents due to aesthetic and functional problems. Since the completion period of hemangioma fading is mostly after 9 years old, the best time for plastic surgery is from 8 to 12 years old. As for laser, although certain scholars have different opinions, it is recommended to be used after 15 months, and the treatment plan should be completed at the age of 3.5 years. At this time, children’s body image begins to develop and there is a risk of ridicule from other children.