U.S. doctors online nowAsk doctors free
A 44-year-old member asked:

Could use expert help with why are outy belly buttons so rare?

1 doctor answer1 doctor weighed in
Dr. Martin Fried
Nutrition 37 years experience
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.
Created for people with ongoing healthcare needs but benefits everyone.

Related questions

A 43-year-old member asked:
Self-conscious about outy belly button. Any ways to fix this?
1 doctor answer1 doctor weighed in
A 45-year-old member asked:
What determines an innie or outtie belly button?
2 doctor answers10 doctors weighed in
A 49-year-old member asked:
What to do if I have an outtie belly button and I am going to have sex (for guys)?
1 doctor answer1 doctor weighed in
Last updated Jul 18, 2014

People also asked

Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
24/7 visits - just $39!
50% off with $15/month membership


Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.