Prevalent group: infants. Common site: Facial skin, subcutaneous tissue and oral mucosa, such as the tongue, lips, and floor of the mouth. Common Causes: Small-scale mismatch of gene segments during embryonic development. Common Symptoms: Bright red or purplish-red patches. Infectious: None. I. Etiology During human embryonic development, especially in the early vascular tissue differentiation stage, due to the small-scale misconfiguration of its controlling gene segments, it leads to abnormal tissue differentiation in specific parts of the body and develops into hemangioma. In the early embryonic stage (8~12 months) embryonic tissues suffered mechanical injury, local tissue hemorrhage caused part of hematopoietic stem cells distributed to other embryonic characteristic cells, and some of them differentiated into vascular-like tissues and eventually formed hemangiomas. Clinical manifestations: 1. Capillary hemangioma tumor is composed of a large number of intertwined and expanded capillaries. It manifests as bright red or purple-red plaque. It is flush with the skin surface or slightly elevated, with clear boundary, irregular shape and different sizes. When the tumor is pressed by fingers, the color recedes; after the pressure is lifted, the color is restored. 2.Cavernous hemangioma tumor consists of enlarged blood vessel cavity and blood sinus lined with endothelial cells. The size of blood sinus is different, like spongy structure, the cavity of sinus is full of venous blood and traffic with each other. The tumor is a soft, slow-growing mass with no conscious symptoms. When the head is in a low position, the tumor expands due to blood congestion, and the mass returns to its original shape after returning to the normal position. In superficial tumors, the surface skin or mucous membrane is greenish purple. In the deep part, the skin color is normal. On palpation, the mass is soft, with unclear boundary and no pressure pain. When squeezed, the mass shrinks and returns to its original size after the pressure is lifted. Trapezoidal hemangioma is mainly formed by the anastomosis of dilated artery and vein. The tumor is high up in the form of rosary or earthworm. There are sensation of movement and tremor when looking at it, and there is wind-like murmur on auscultation. If the blood-supplying arteries are completely closed, the above motility and murmur will disappear. Diagnosis of cervical hemangioma according to clinical manifestations is generally not difficult, but special attention should be paid to the invasion of some important organs in the deep neck, such as carotid artery and larynx. Puncture of the tumor is very helpful for diagnosis, and if blood is drawn out, the diagnosis can be confirmed. Fourth, there are many treatment methods for hemangioma, which should be based on the type, location, depth of the tumor and the age of the patient and other factors. Commonly used methods include: laser treatment, oral propranolol, surgical excision, sclerotherapy injection and so on.