Vascular birthmarks are often just called birthmarks. They occur in the first few weeks after birth. They can be pink, blue, brown, tan or red in color. A vascular birthmark is not necessary dangerous in itself. However, they are made up of an increased number of blood vessels within the location on the skin. Some of these birthmarks are raised, but they can be flat, too. They can take on different colors, too. There are several different types of birthmarks. It can take several weeks to determine the type. For example, macular stains are flat. Other types include port wine stains and hemangiomas. Each type is slightly different in its look and make up.
- There is no known cause for vascular birthmarks, though it is known that they are not inherited or caused by anything that happens during the pregnancy.
- One in every ten babies is born with a red vascular birthmark.