Common benign skin tumors in childhood are hemangiomas, including nevus erythematosus (also known as dilated capillary nevus), capillary hemangioma, cavernous hemangioma, and so on. These tumors are characterized by large red or purplish-red spots, several bright red soft nodules, and large lobulated purplish-red soft nodules. Nevus erythematosus will only gradually expand and deepen but will not subside naturally, while capillary hemangioma and cavernous hemangioma can subside naturally after 2 years of age, so it was thought that early treatment was not necessary and only observation was needed. However, it is difficult to estimate which type of hemangioma will subside naturally? Which kind of hemangioma will continue to grow? In addition, the current pulse dye laser treatment of hemangiomas is less painful and has fewer side effects, and can be safely used on infants and young children who are only about 10 days old, therefore, most experts now believe that early intervention treatment should be implemented.