Question: what is the difference between in and out belly buttons?
Answer: The difference between an "innie" and an "outie" belly button has nothing to do with management of the umbilical cord at birth. ... Later in life, this looks like a knot or polyp of skin protruding from the base of the umbilicus. The only concern with an "outie" belly button is if it is caused by an umbilical hernia.