A 44-year-old member asked:
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could use expert help with why are outy belly buttons so rare?

1 doctor answer
Dr. Martin Fried
36 years experience General Practice
Type of scar: In humans, the navel scar can appear as a depression (often referred to colloquially as an innie) or as a protrusion (outie). About 90% of humans have innies. The occurrence of an outie navel is caused by the extra skin left from the umbilical cord. As navels are scars, and not defined by genetics, they can serve as a way of distinguishing between identical twins.
Answered on Jul 18, 2014

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Related questions:

A 41-year-old member asked:
Dr. George Klauber
Specializes in Pediatric Urology
Outy BB is a hernia: Normal belly buttons are "iny". "outy"belly buttons are umbilical hernias.
A 43-year-old member asked:
Dr. Ronda Dennis-Smithart
Specializes in Pediatrics
Wgt loss, surgery: If you are pregnant or overweight, it may resolve with wgt loss or birth of your child. If you've always had an 'outy', talk to a plastic surgeon.
A member asked:
Dr. Roy Benaroch
27 years experience Pediatrics
No: There's a ligament from the back of the belly button to deep inside the body-- as people grow, the belly button will always pull backwards and become ... Read More
A 34-year-old member asked:
Dr. Yash Khanna
57 years experience Family Medicine
Umblical hernia: Inn belly buttons are normal, but in some kids and it can continue in adults there is little out belly button called umblical hernia.

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