Vascular nevu refers to the type of birthmark that occurs due to the overgrowth of blood vessels in the skin. These marks usually develop during infancy and can be present anywhere on the body. Vascular nevi come in different variations such as port-wine stains, hemangiomas, and others. However, they all share a similar characteristic of having a red or purple coloration. Synonyms for vascular nevi include vascular birthmarks, hemangioma, strawberry nevi, and capillary malformations. Detection of vascular nevi typically involve visual examination by a physician while treatment options include laser therapy, surgery, or medication. It is important to consult with a medical professional to determine the best course of treatment for vascular nevi.