Hemangiomas can be essentially divided into two types: vascular malformations (malformations) caused by vascular overdevelopment or abnormal differentiation during embryonic development, and true tumors arising from abnormal proliferation of vascular endothelial cells. They are classified into four types according to their structure, with different clinical course and prognosis. In addition, hemangiomas are often a manifestation of certain syndromes, such as Sturge-Weber syndrome with wine pigmentation and ipsilateral soft meningioma, Klippel Trenaunna triad syndrome with wine pigmentation plus venous malformation and limb length discrepancy, Parkes-Weber’ syndrome with Klippel Trenaunay’s syndrome is similar to Klippel’s syndrome, and the latter is often associated with arteriovenous fistulas. Common types: Erythema nevosum, also known as wine stains. It is a light red or dark red patch that does not fade when pressed and does not rise above the surface of the skin, located in the dermis and composed of capillary network. After birth, erythema nodosum grows proportionally with the growth of the body, but the scope no longer expands. Erythema nevosum cannot fade away by itself. Apart from affecting the beauty, erythema nodosum is generally harmless and can be treated by freezing if necessary.