After laser treatment, the hemangioma will shrink and the symptoms will be reduced, but local blood clots will also be formed, hard lumps can be palpated at the hemangioma, and some will produce local swelling, such as redness, swelling and pain. After a period of treatment, mainly medication, such as oral Veritin and Diosmin, can promote the dissipation of these symptoms after laser treatment. Hemangioma after laser treatment is mainly due to the effect of heat, which forms thrombus locally and needs to be slowly mechanized by the body, and medication can play an auxiliary role. Some hemangiomas are relatively large, and a single laser treatment cannot solve all the hemangioma problems, so another laser treatment is needed to completely solve the hemangioma.