This list is for birthmarks in fiction books.

A birthmark that is predominant (on the hands, face, etc) would work. A birthmark that is important and hails the MC as the chosen one would apply. Things like that.

If it's too small or unimportant to the character/plot, then it might be best to not add the book. Not all birthmarks are important enough to add. For example, one on the MC's back that is not seen, thought of or mentioned except for a passive comment - doesn't really fit the list.

Types of Birthmarks:
Café au lait spots
Mongolian blue spots
Salmon patches
Hemangiomas
Port-wine stains (nevus flammeus)


This list is also not for soulmark tropes (where the name of your soulmate is tattooed/marked on your body at birth)
It is also NOT for: scars, tattoos, or other acquired features.