Birthmark Causes and Treatment

What Causes Birthmarks?

The cause of most birthmarks is unknown. Most birthmarks are not inherited. Many folk tales and myths exist about the causes of birthmarks, but none of these stories have been proven to explain the true causes of birthmarks.

Do Birthmarks Need to Be Treated?

Most birthmarks need no treatment. They often fade as a child grows older. However, some birthmarks may need treatment because of their location. For example, a raised birthmark near a child's eye may interfere with his or her ability to see. In rare cases, birthmarks are associated with other conditions, such as growths on the liver, lungs, stomach, or intestines.

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WebMD Medical Reference