When the birthmark is not obvious or does not affect the appearance of the baby, it can be left untreated, and if necessary, surgical excision or laser methods can be chosen to eliminate or reduce the birthmark. If the birthmark affects the appearance or the function of the organs, some of them need to be removed by surgery or laser, or can be removed by freezing, depending on the size, location and depth of the birthmark to determine the treatment plan. The diagnosis and treatment results are different for each birthmark treatment method. It is best to go to the dermatology department of a regular hospital for an examination to determine which one it is, and then decide on the treatment method under the guidance of the doctor.