Birthmarks can generally be divided into pigmented and vascular types. Common pigmented types include nevus of Ota, congenital pigmented nevus, coffee spot, etc., and vascular types include nevus of bright redness, strawberry-like hemangioma, etc. The color of birthmark is mainly red and black, which can be found at birth or may develop gradually after several months of birth. For birthmarks, if for aesthetic reasons, the following medical methods can be used to remove them: 1. Cryotherapy: Cryotherapy is a more effective treatment for birthmarks, which destroys the local skin by means of low-temperature treatment and can lead to the regeneration of skin tissue, thus achieving the effect of removing birthmarks. It is recommended to follow the principle of early treatment and early recovery, most of the birthmarks need a process in the process of removal, only to seize the best treatment time as early as possible to prevent the spread of birthmarks to the surrounding; 2, laser treatment: laser treatment of birthmarks is to make the specific wavelength of laser through the epidermis and dermis to reach the tissue of accumulated pigment, the role of pigment particles, so that they dissolve and fade, to achieve the role of removing birthmarks. Since the laser works only on the pigment particles, there is little or no damage to the epidermis. Some of the birthmarks are vascular type, and the treatment by dye laser will not leave scars, and the fading effect is very good; 3.Surgical excision: for the birthmarks with very large area and serious condition, they can be removed by surgical excision. However, because of the need for skin implantation after excision, infection and rejection may occur, surgical excision is not recommended in general.