Hemangiomas and vascular malformations are congenital benign tumors composed of vascular tissue and can occur in the skin, subcutaneous tissue, muscle, bone cheese, and internal organs such as the brain, liver, and heart. The incidence rate of infants and young children is 1%~2%, and the incidence rate of female infants is 3 times that of male infants, and the oral and maxillofacial region accounts for about 70% of the whole body. In 1963, Vinchow classified hemangiomas into three categories based on pathologic histologic anatomy: simple hemangiomas containing capillaries; cavernous hemangiomas containing a large number of channels; and trabecular hemangiomas containing significantly dilated arteriovenous traffic branches. This traditional classification is relatively concise and largely reflects pathologic histologic features, but clinical treatments do not fully correspond to the pathologic histomorphologic features. In 1982 Mulliken and Glowacki divided the morphologic classification of hemangiomas into two categories, hemangiomas and vascular malformations, based on a combination of cytologic studies and clinical findings. Hemangiomas have proliferative and regressive phases of endothelial cell proliferation. Vascular malformations have normal endothelial cell division and abnormal structure of the angiogenic process. This classification reflects the biological features of the disease and facilitates clinical diagnosis, treatment and prognostic assessment. The two are completely different in histopathology and clinical manifestations. True hemangiomas are found about one month after birth and 8% can regress spontaneously and are rare clinically. Vascular malformations, on the other hand, do not regress spontaneously and increase in size with age. Vascular malformations can be further classified clinically into low-flow types (capillary, veno-lymphatic or mixed) and high-flow types (arteriovenous malformations and arteriovenous fistulas). In 1995 Waner and Suen proposed a modification and addition to Mulliken’s classification. Angiomas (strawberry angiomas) and vascular malformations were collectively referred to as vascular diseases. Vascular malformations include: microvenous malformations (midline microvenous malformations – salmon spots; microvenous malformations – wine-colored spots), venous malformations (cavernous hemangiomas), arteriovenous malformations (trabecular hemangiomas) and lymphovascular malformations (microcystic – capillary and cavernous lymphangioleiomas; macrocystic – cystic hydatidiform tumor), and mixed malformations (venous/lymphatic malformation-lymphangioleiomyoma; venous/microvenous malformation).