1.What kind of cases can wait for observation? It is applicable to the proliferating hemangioma which is small in size in the receding hemangioma or non-important area, or in the stable growth stage and has not caused important impact on the aesthetics and function. 2.How to observe? During the observation period, the growth of hemangioma should be monitored by objective methods such as digital photos or precise measurements. 3.What kind of conditions need immediate intervention and treatment? (1) Rapid growth of hemangioma; (2) Large hemangioma with bleeding, infection or ulceration; (3) Impact on vital functions such as feeding, breathing, swallowing, hearing, vision, excretion or motor functions; (4) Platelet reduction syndrome; (5) Combined high output congestive heart failure; (6) Lesions invading important facial structures such as eyelids, nose, lips, auricles, etc.