OCT 10, 2017 05:52 AM PDT

What's the Deal with the Third Nipple?

WRITTEN BY: Xuan Pham

Many of our body parts come in pairs - eyes, ears, hands, feet, and so on. In rare instances when the rule of two is exceeded, the result is unusual to say the least. One of the more well-documented exception is the nipple - the third nipple, to be more specific.

Third nipples are known medically as supernumerary nipples. Although these can occur anywhere on the body, they more commonly occur along the body's "milk lines" - two vertical lines that run from each underarm, through the nipple, to the groin.

The presence of more than two nipples is considered rare, affecting less than 0.5% of Americans (around 200,000). However, some people argue the condition may be more common since third nipples don't usually look like a fully formed nipple and may be easily confused with moles.

If you do find a 'nipply'-looking mole along your mammary lines, it could indeed be a third nipple. And if so, you'd share a commonality with Mark Wahlberg, Lily Allen, and Tilda Swinton!
About the Author
  • I am a human geneticist, passionate about telling stories to make science more engaging and approachable. Find more of my writing at the Hopkins BioMedical Odyssey blog and at TheGeneTwist.com.
You May Also Like
NOV 19, 2019
Space & Astronomy
NOV 19, 2019
Here's Why NASA Wants to Learn More About Metallic Asteroids
NASA’s Psyche mission will investigate the properties of a unique metallic asteroid residing between Mars and Jupiter as it orbits the Sun. It’...
NOV 19, 2019
Space & Astronomy
NOV 19, 2019
All About NASA's Upcoming Plan to Explore Europa
Planetary scientists have been in search of potentially habitable worlds for years, and perhaps one of the most promising places we have yet to explore in...
NOV 19, 2019
Genetics & Genomics
NOV 19, 2019
Dolphins Lost 85 Genes to Become Aquatic
Dolphins, whales and porpoises are marine mammals; otherwise known as cetaceans. Although they live exclusively underwater nowadays, tens of millions of ye...
NOV 19, 2019
Plants & Animals
NOV 19, 2019
The Penguin Life Isn't Always Easy
Mother nature isn’t kind to wildlife; many assume their position as either the prey or the predator depending on the cards they’re dealt. Unfor...
NOV 19, 2019
Plants & Animals
NOV 19, 2019
What Makes Lions Such Incredible Predators?
Lions sport a reputation as one of nature’s fiercest beasts, but have you ever wondered what makes them such renowned predators? These large cats are...
NOV 19, 2019
Chemistry & Physics
NOV 19, 2019
Will Thorium Reactors Have a Future in Clean Energy?
In its pure form, thorium is a silver-black colored metal. Named after Thor, the hammer-wielding Norse god of thunder, it is the 90th element on the period...
Loading Comments...