Nipples aren't just decorative—but you already knew that. Something you may not have known: Your nipples can clue you in to some serious health problems.
If you notice sudden puckering or dimpling of the skin around or on your nipple—particularly if it occurs around just one nipple—call your doctor. This could be a warning sign of breast cancer.
Here are 7 more things you need to know about your nipples...
1. Nipple discharge is often normal - even if you're not pregnant or breastfeeding
This discharge (milky, bluish-green, or clear) can occur in most women if the nipple is squeezed, explains Leah S. Gendler, MD, a breast surgeon at Morristown Medical Centre in New Jersey. But if you're not squeezing—and especially if the discharge is bloody and/or coming from just one of your breasts—see a health care professional, Gendler advises. The discharge could be the result of a benign growth, a harmless cyst, or breast cancer.
2. Third nipples are actually quite common
'Supernumerary',or third, nipples are often mistaken for moles or skin tags. Having a third nipple isn't a problem, and it can easily be removed in an outpatient procedure, explains plastic surgeon Grace Ma, MD, of Peachtree Plastic Surgery in Atlanta. 'The entire procedure takes about 30 minutes,' she says, 'and recovery is minimal.'
3. Exercise can chafe nipples
A well-fitting sports bra helps, as do non-chafing balms or round Band-Aids applied to the nipples. But if you're not doing vigorous activity and notice your nipples are red, itchy, scaly, and/or flaking, see your doctor. This could be a sign of Paget's disease, a rare form of cancer involving the nipple and areola, Gendler says. She adds: 'It could also be eczema, so don't get anxious. Just have your doctor assess.'
4. Hairy nipples are common
Those small bumps around the nipples are normal hair follicles. If you've got dark hairs growing on your nipples, pluck, wax, or cut them carefully. If these hair follicles become painful, grow in size, or are itchy and scaly, see your doctor. It could be a sign of infection—or cancer.
5. Nipple pain during breastfeeding is common (and preventable)
Throbbing, burning, cracked, or sore nipples are all common complaints, particularly in the first few weeks of breastfeeding. But if this pain continues, consult a breastfeeding specialist; your baby may not be latching on properly. Engorged breasts can also trigger nipple pain, as can an infection of the nipples triggered by bacteria or Candida yeast, says one Australian study.
6. Inverted nipples are no cause for concern
About 15% of women have inverted nipples from birth, says Z. Paul Lorenc, MD, a plastic surgeon in New York City. 'It's a simple matter of connective tissue retracting the nipple inward,' he explains. 'It's a relatively minor surgical procedure to correct it. We make a tiny incision to release the connective tissue, and the nipple pops out. We can do both nipples under local anesthesia in about an hour.'
7. Nipples are erogenous zones for women
According to researchers at Rutgers University, the sensation from nipple stimulation travels to the same pleasure centres of the brain as sensations from the vagina, clitoris, and cervix. Piercing fans, take note: Nipple piercings may lead to loss of sensation due to nerve damage.
This article originally appeared on Women's Health.