A human can have between one and nine nipples, including the two that are typical.
Supernumerary Nipples: More Than Two
While most humans have two nipples, some individuals are born with extra nipples, a condition called polythelia or supernumerary nipples. These extra nipples can appear anywhere along the "milk line," which runs from the armpit down to the groin on both sides of the body.
The Range of Supernumerary Nipples
- The most common number of extra nipples is one, resulting in three nipples total.
- However, it's possible for a person to have up to eight supernumerary nipples, bringing the total possible nipple count to nine.
Understanding the Milk Line
The "milk line" is a reminder of our evolutionary past. During fetal development, multiple mammary glands form along this line, but usually, all but the two in the chest area disappear before birth. When some of these extra glands persist, they can appear as additional nipples.
Characteristics of Supernumerary Nipples
- Supernumerary nipples can vary greatly in appearance.
- They may look like a small mole or a slightly raised patch of skin.
- They may also be small, underdeveloped nipples, sometimes with areolas or even a small amount of breast tissue.
- Sometimes, they can resemble a regular nipple.
- Some might not be easily noticeable, while others are clearly visible.
Are They a Health Concern?
Generally, supernumerary nipples are harmless. In rare cases, they can be associated with other conditions. However, usually they are just a harmless variation of human anatomy.
Summary
Humans typically have two nipples. Some individuals may have additional nipples, with the most common being one extra (three nipples total). It's possible for a person to have up to eight extra nipples, meaning a human can have between one and nine nipples.
