Can you not have a birthmark?

Answer 1

It is more common to not have one.

Not true: Most people have some sort of mark on their bodies at birth, but most fade/ disappear totally in the early months/ years of life. Many people have faint pink birthmarks on their heads or back of the neck ("stork marks") which generally are covered by their hair, and are, therefore, not very noticeable.

The majority of Asian babies (probably 70%+), and often those with some Asian ancestry, are born with blue or purple marks on the base of the spine or the buttocks (the so-called "Mongolian mark"), most of which fade/ disappear early in life... but not always.

It is true that "classic" brown, black or red/ purple birthmarks are less common: many medical authorities estimate about 10% of most populations bear such marks.

Finally, most people have at least 20 smaller marks ("moles") on their bodies, although most of these emerge later in life (often at puberty), and, therefore, are not technically "birthmarks".

IMO, most people do have some sort of birthmark; many, however, either fade rapidly in early life or are not very visible. Also, many people are very self-conscious about their birthmarks, and spend huge amounts of time and energy covering them up.

Answer 2

It's perfectly normal, but quite unusual: most people have marks on their bodies at birth, but most such marks are either very small or fade/ disappear during the first few months of life. Often birthmarks are on the head/ back of neck, and, therefore, are usually covered by hair once someone is older, so many don't even realize they have birthmarks - until someone tells them, or hair falls out!

"Classic" birthmarks such as brown patches, distinct moles etc, occur in approximately 10% of most populations, and are somewhat more common on females than males. The "Mongolian Spot" is found on the majority (70%+) of newborns of Asian populations, and of certain other population groups (Native American; Gypsy) having strong Asian ancestry, but most disappear during infancy.

So, whilst most people do not have distinct and highly visible birthmarks, in reality many (most, in fact) probably had marks when born, or maybe still have them, but in places that are not obvious! Having or not having a birthmark is just down to "happenstance", and in most cases is perfectly "normal" either way.