This Is What Really Causes Birthmarks
There are a few theories about what causes birthmarks Shutterstock While we know what gives birthmarks their color, we don’t know what causes the abnormal blood vessels or clusters of pigment cells to form, although there are a few theories. According to the book Diseases and Disorders, there is research that suggests certain circumstances such as being born premature, multiple births, and the use of fertility drugs are linked to the development of birthmarks....