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A 45-year-old member asked:

What determines an innie or outtie belly button?

2 doctor answers10 doctors weighed in
Dr. Carlo Contreras
A Verified Doctoranswered
Surgical Oncology 19 years experience
Not necessarily.: An "outie" navel does not necessarily mean that you have an umbilical hernia. Ask your doctor to perform a physical exam to evaluate. If you do have a hernia, surgical repair is safe and effective. However, not all umbilical hernias need to be fixed. Those that are growing or causing symptoms should be fixed.
Dr. Heidi Fowler
Psychiatry 26 years experience
Navel: The navel is a scar where the umbilical cord was once attached. Around 90% of people have a depression (innie) ; about 10% have a protrusion (outie). It is reported that a protruding navel develops because of more abundant skin remaining after the umbilical cord is separated. However, it is still largely a mystery.

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Last updated Sep 27, 2017
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