The severity of a venous vascular malformation depends largely on the size of the malformation or the location of the growth. If the area is small and the growth is not in an important tissue or organ, it usually does not cause serious consequences, but if the growth is in the head and neck area, such as the eyes, ears, mouth and nose, it may have a serious or even life-threatening effect on vision, hearing, and eating, and it may also cause great cosmetic confusion. If they grow around the perineum or anus, they may cause frequent bleeding, but generally they have less impact when they grow on the trunk and limbs, and may cause localized pain and other conditions that do not seriously affect physiological function. In summary, the severity of venous vascular malformations still depends on the size of the hemangioma and its adjacency to the surrounding tissues and organs.