Are birthmarks hereditary?
Most types of birthmarks aren't hereditary. That means that you typically don't inherit them from your parents. However, there are some cases where certain birthmarks may be due to a genetic defect, and it may or may not run in your family. Some types of birthmarks are associated with rare genetic conditions. Do birthmarks run in families? Hereditary – Some people have birthmarks due to their genes. For example, a child may have the same type of birthmark as a father, mother, grandparent, aunt, or uncle.