Removing birthmarks can be treated with laser. The advantage of laser removal of red birthmark is that compared with the previous methods such as freezing, artificial tattoo, surgical resection, drug injection, sclerosing agent, electrocoagulation, dermabrasion and laser non-selective photothermal action, laser selective treatment of red birthmark has no hyperplastic scar after treatment, and has a better effect on superficial lesions without damaging other tissues.