People have always considered birth marks and beauty marks as meaningful in one way or another, but really, we cannot tell you anything here without a specific culture to go off of. Every culture in the world is very different in what they view within marks.
For instance, my great grandmother's child had a red birthmark in the exact place she was touched and frightened when pregnant. She believed the baby could be harmed by anything that frightened or harmed the pregnant mother and this would show up as birth defects or marks on the newborn. Red marks were called "strawberry birthmarks" and that's the kind my grandmother feared to "give her child" by not being careful or having an accident when pregnant. Brown or black birthmarks were looked at as more significant. For instance, my mother and I have a birthmarks in the exact same spots and we always had a strange twin like connection, even after falling out. So in my culture, red marks are a bad thing we don't want not a mystical revelation.
I'm sorry I can't really help you there. You need more information.