1. Observe the appearance of the tumor: strawberry hemangioma, capillary hemangioma (nevus), trapezoid hemangioma, and cavernous hemangioma all have their unique tumor appearance. Zhao Fuyun of the Department of Laser Aesthetic Plastic Surgery at Peking University Stomatological Hospital 2. Observe their pattern: observe the color change of the tumor when it is cold, hot, when it fluctuates up and down emotionally, after eating spicy stimulating food or drinking alcohol, and most of the hemangiomas will deepen in color. Most of them will deepen in color. Angioglobuloma is especially painful when it is stimulated by cold, and most of them are not allowed to be touched. 3.Press on the tumor itself and observe whether it has faded or shrunk. 4.Place your hand gently on the upper part of the tumor to feel whether there is a heartbeat sound.