A member asked:

Does my youngest child have an innie or outie belly button, how to know?

4 doctors weighed in across 2 answers
Dr. Kyon Hood answered

Specializes in Pediatrics

Answer to your ?: In humans, the navel scar can appear as a depression ("innie) or as a protrusion ("outie"). About 90% of humans have innies. An "outie" navel is caused by the extra scar tissue left from the umbilical cord or from umbilical hernias. Umbilical hernias happen when the abdominal wall muscles don't close completely. This is not a concern & they eventually close on their own by age 3-4 yrs old.

Answered 1/31/2015

4k views

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Dr. Oscar Novick answered

Specializes in Pediatrics

Innie vs. Outie: If the belly button protrudes it's an outit, if it's sunken it's an innie

Answered 8/18/2014

3.8k views

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