Nipple pain is extremely common and almost always tied to something harmless: hormonal shifts, friction, or skin irritation. The cause usually depends on your age, sex, and what’s happening in your body at the time. Here’s a breakdown of the most likely reasons and what to look for.
Hormonal Changes During Your Cycle
The most common reason for nipple soreness is the normal rise and fall of hormones during your menstrual cycle. After ovulation, progesterone levels climb sharply during the luteal phase (roughly the two weeks before your period). This causes the milk gland tissue in your breasts to swell, and fluid retention adds a feeling of fullness and tightness. Your nipples can become tender, sensitive to touch, or outright painful.
This type of soreness is predictable. It tends to peak in the days right before your period starts and fades once bleeding begins. If you notice a clear monthly pattern, hormones are almost certainly the explanation. Hormonal birth control can also trigger or worsen nipple sensitivity, especially in the first few months of use.
Early Pregnancy
Sore, sensitive nipples are one of the earliest signs of pregnancy, showing up as soon as one to two weeks after conception. Your body floods with hormones that rapidly prepare your breasts for milk production. Blood flow to the breast tissue increases, the milk ducts begin to grow, and the milk-producing glands expand. All of that remodeling makes your nipples particularly sensitive in the first trimester.
The good news is that extreme nipple sensitivity in pregnancy typically passes within a few weeks, even though overall breast tenderness may linger longer. If you’re experiencing unusually intense nipple pain and your period is late, a pregnancy test is a reasonable next step.
Friction and Chafing
Physical irritation from clothing is a surprisingly common cause, especially among runners. The condition is literally called “jogger’s nipple.” Each stride slightly shifts your shirt across your chest, and over thousands of repetitions, that friction cracks and chafes the skin. One study found that nearly 36% of runners logging more than 40 miles a week experienced nipple chafing.
Cotton shirts are a major culprit because the fabric gets heavy and wet with sweat, increasing friction. Cold weather also raises the risk because nipples become more erect and more exposed to rubbing. The fix is straightforward: wear moisture-wicking synthetic fabrics, apply petroleum jelly or adhesive bandages over your nipples before a run, and avoid loose, rough-textured tops during exercise.
Skin Irritation and Allergies
Nipple skin is thinner and more sensitive than the surrounding breast tissue, which makes it a prime target for contact dermatitis. Common triggers include fragranced laundry detergents, body washes, lotions, and fabric softeners. Even a product you’ve used for years can start causing a reaction.
The result is redness, itching, dryness, or a rash concentrated around the nipple and areola. Switching to fragrance-free, dye-free soaps, detergents, and moisturizers usually resolves it within a week or two. If you recently changed any product that touches your chest, that’s the first thing to eliminate.
Breastfeeding-Related Pain
Breastfeeding brings its own set of nipple pain triggers. A poor latch is the most frequent one: if the baby isn’t taking enough of the areola into their mouth, the nipple bears the brunt of the suction and quickly becomes cracked and raw.
A less well-known cause is nipple vasospasm, where the blood vessels in the nipple suddenly constrict and cut off blood flow. People with vasospasm describe an intense, throbbing, burning pain that can hit before, during, or after feeding. The nipple tip turns white during a spasm, then shifts to purple, blue, or red as blood flow returns. Cold temperatures make it worse. Warming the nipple immediately after feeding and avoiding cold air exposure can help.
Yeast infections on the nipple (sometimes called thrush) are another possibility during breastfeeding. Signs include redness, cracked or shiny skin around the nipple, itching, and shooting pains that radiate into the breast. Mastitis, a bacterial infection of the breast tissue, comes on fast with flu-like symptoms: fever, chills, fatigue, and body aches along with a red, hot, painful area on the breast. Mastitis typically needs antibiotic treatment if symptoms don’t improve quickly.
Puberty and Breast Development
In teenagers of any sex, nipple pain is a normal part of development. As breast tissue forms, the area beneath and around the nipple can feel sore, swollen, or tender to the touch. In adolescent males, more than half experience some degree of breast enlargement during puberty, a condition called gynecomastia. It happens because estrogen levels temporarily rise faster than testosterone. This imbalance usually corrects itself within six months to two years and doesn’t require treatment.
Duct Changes Near Menopause
A condition called mammary duct ectasia is most common between ages 45 and 55, during perimenopause. The milk ducts beneath the nipple widen, thicken, and fill with fluid, which can cause swelling and tenderness around the nipple. Other signs include a color change in the nipple or areola, a dirty white, green, or yellowish discharge, and occasionally a small lump near the affected duct. It’s not cancerous and often resolves on its own, though persistent symptoms sometimes need treatment.
When the Cause Could Be Serious
Rarely, persistent nipple changes point to something that needs prompt attention. Paget’s disease of the breast is a form of cancer that starts in the nipple and can look deceptively like eczema. The warning signs include flaky, scaly, or crusty skin on the nipple that doesn’t heal, a burning sensation, straw-colored or bloody discharge, a nipple that turns inward, or a lump in the breast. Symptoms typically affect only one side. The key difference from ordinary eczema or dermatitis is that Paget’s disease doesn’t respond to standard skin treatments and gradually worsens over weeks to months.
Any nipple pain that persists for more than a couple of weeks without an obvious explanation, appears on one side only, or comes with visible skin changes, discharge, or a lump is worth getting evaluated. In the vast majority of cases, though, the cause turns out to be hormonal, mechanical, or easily fixable.