Third nipples, also known as accessory nipples or polymastia, can vary in appearance, but they typically resemble a small mole, a slightly raised bump, or a small, underdeveloped nipple. They're often found along the "milk line."
Appearance and Location
- The "Milk Line": The most common location for a third nipple is along the embryonic milk line. This line runs from the armpit, down the chest, past the normal nipple, and down to the groin.
- Size and Shape: They can range in size from a small pigmented spot to a fully formed nipple and areola. Often, they appear as just a small bump or mole-like marking.
- Nipple and Areola: Some may have a small, raised nipple and a surrounding areola (the darker skin around the nipple). Others may only present as a pigmented spot.
- Hair: Sometimes, they may be surrounded by a small amount of hair.
Common Characteristics
- Small and Unremarkable: In many cases, third nipples are so small and unremarkable that they are easily mistaken for moles or birthmarks.
- Often Symmetrical: Though not always, they can sometimes appear symmetrically on both sides of the body.
- Swelling or Tenderness: Hormonal changes (such as during menstruation or pregnancy) can cause the accessory nipple to swell or become tender.
- Discharge: In rare cases, a third nipple may produce milk or other discharge, particularly during pregnancy or breastfeeding.
When to See a Doctor
While usually harmless, consult a doctor if:
- The third nipple is painful or inflamed.
- There is discharge from the nipple.
- You are concerned about its appearance.
