In the past, it was very difficult to treat birthmarks. Common methods to treat birthmarks are: freezing, surgery, etc. Because of the depth of the lesion, the treatment of these birthmarks is very unsatisfactory. High-intensity pulsed laser combined with high-energy Q-switched laser can adjust energy according to the depth of pigment, absorb pigment particles, and make them vaporize and rupture, so as to achieve the purpose of treatment, and will not recur after treatment. It is the most ideal treatment method at present.