A vascular malformation is an abnormal growth of blood vessels that can occur anywhere in the body. These malformations can be present at birth and may grow over time. They can vary in size and appearance, often appearing as red or purple marks on the skin. Some common types include capillary malformations, venous malformations, and arteriovenous malformations. While many vascular malformations are harmless, some can lead to complications, such as pain or bleeding. Treatment options depend on the type and severity of the malformation and may include surgery, laser therapy, or embolization to reduce blood flow to the affected area.