What lives in your belly button?
Christopher Snyder
Updated on March 01, 2026
If you're an innie and not an outie, your belly button is home to at least 60 to 100 or more species of bacteria, fungi and yeasts, according to new research. If you're an innie and not an outie, your belly button is home to at least 60 to 100 or more species of bacteria, fungi and yeasts, according to new research.
What is living in my belly button?
What's inside your belly button? Probably dirt and sweat; possibly some lint, and perhaps even a piercing. But according to new research, which asked 66 men and women to swab their navels with a sterile Q-tip, the skin in study participants' belly buttons also contained an average of 67 different species of bacteria.What is the stuff you find in your belly button?
Omphaloliths. As dead skin cells and sebum — the oil secreted by your skin — accumulate in your bellybutton, they can form an omphalolith over time. Also known as a navel stone, they're made of the same materials that form blackheads.What bacteria is found in your belly button?
The most common skin bacteria encountered on participants in the Belly Button Biodiversity Project belonged to the groups Staphylococci, Corynebacteria, Actinobacteria, Clostridiales, and Bacilli. For some of the common belly button species, we know a lot about their biology.What is the dirtiest part of your body?
Keep your hands off your belly buttonDid you know that your belly button is the dirtiest part of the body, according to the Public Library of Science? “The belly button harbors a high population of bacteria,” Dr. Richardson says.