Nipple pain is almost always caused by something ordinary: hormonal shifts during your menstrual cycle, friction from clothing, pregnancy, or breastfeeding difficulties. Less commonly, skin conditions, blood vessel spasms, or rarely, a sign of breast disease can be responsible. The cause usually becomes clear once you identify the pattern of when the pain shows up and what it feels like.
Hormonal Changes During Your Cycle
The most common reason for nipple and breast soreness in people who menstruate is the normal rise and fall of hormones each month. During the first half of your cycle, estrogen stimulates the growth of milk ducts inside the breast. After ovulation, progesterone takes over and triggers the formation of milk-producing glands. This second half of the cycle, called the luteal phase, is when breast cell activity is at its highest and when most people notice soreness, swelling, or sharp sensitivity in the nipples.
This kind of pain is cyclical, meaning it follows a predictable rhythm. It typically ramps up in the week or two before your period and eases once bleeding starts. Both breasts are usually affected. If that timing matches your experience, hormones are the overwhelmingly likely explanation, and no treatment is needed beyond over-the-counter pain relief on particularly uncomfortable days.
Early Pregnancy
Nipple tenderness is one of the earliest signs of pregnancy, sometimes appearing before a missed period. Hormonal surges can make breasts sore, sensitive, or swollen as early as two weeks after conception, though changes more commonly show up between weeks four and six. The sensation often feels similar to premenstrual soreness but more intense and persistent. If your period is late and the tenderness isn’t letting up on its usual schedule, a pregnancy test is a reasonable next step.
Friction and Chafing
Repetitive rubbing from fabric is a surprisingly common culprit, especially for runners. Every stride shifts your shirt slightly across your chest. Over the course of a long run, that micro-movement can crack and chafe the skin of the nipple. Cotton shirts are particularly notorious because they absorb sweat, get heavy, and cling. Cold weather makes things worse by causing nipples to become more erect and exposed to rubbing.
If friction is your issue, a few adjustments solve it:
- Switch fabrics. Lightweight, moisture-wicking materials pull sweat to the shirt’s surface instead of sticking to your skin.
- Wear a snug fit. A well-fitting shirt or supportive sports bra reduces the back-and-forth movement that causes chafing.
- Use a barrier. Adhesive bandages placed over the nipples before a run, or a thin layer of petroleum jelly, prevent direct contact with fabric.
Breastfeeding Problems
Some nipple soreness in the first days of breastfeeding is normal and tends to resolve on its own within 7 to 10 days postpartum, regardless of what treatments are used. A large randomized trial found that nearly all participants experienced less nipple pain after that initial window, whether they applied lanolin ointment or not.
Pain that persists or gets worse, though, usually points to a specific problem. A poor latch, where the baby isn’t taking enough of the areola into their mouth, is the most frequent cause and creates sharp pain at the start of each feeding. A lactation consultant can help reposition the baby to fix this quickly.
If the pain feels deeper or more like an ache that spreads through the breast, subacute mastitis (an overgrowth of bacteria causing inflammation) may be involved. A yeast infection on the nipple, sometimes called thrush, tends to produce shooting pain, itching, and visible redness or cracking around the nipple. Both of these conditions need professional evaluation rather than home remedies.
Nipple Eczema and Skin Irritation
The skin of the nipple can develop eczema just like skin anywhere else on the body. Nipple eczema causes itching, redness, flaking, and sometimes cracking that can be genuinely painful. It’s often triggered by repeated friction, contact with chemical irritants in soaps or detergents, or allergens in clothing or lotions.
Treatment focuses on calming the inflammation and protecting the skin. Prescription anti-inflammatory creams are the standard first step and are considered safe even during breastfeeding. Switching to fragrance-free, emollient-based wash products and moisturizing the nipple area regularly also helps. Warm water compresses or black tea compresses can provide comfort while the skin heals. If you’re breastfeeding and dealing with eczema, nipple shields and latch adjustments can reduce further irritation.
Vasospasm From Cold or Poor Circulation
Some people experience intense, burning nipple pain triggered by cold air or sudden temperature changes. This is caused by vasospasm, a condition where small blood vessels in the nipple constrict sharply, cutting off blood flow temporarily. You may notice the nipple tip turning white, then blue or purple, before flushing back to its normal color. The pain can last seconds or several minutes.
This is essentially Raynaud’s phenomenon affecting the nipple. It’s more common in people who already have Raynaud’s in their fingers or toes. Avoiding cold exposure is the most effective strategy. Smoking and nicotine make vasospasm worse. For breastfeeding parents, a poor latch or cracked nipples can also trigger episodes, so addressing those underlying problems often resolves the spasms.
When Nipple Pain Signals Something Serious
The vast majority of nipple pain is benign, but a few specific patterns deserve prompt medical attention. Paget’s disease of the breast is a rare form of cancer that starts in the nipple and can initially look a lot like eczema. The key differences: Paget’s disease almost always affects only one breast, and the changes are persistent and progressive rather than coming and going. Watch for flaky, crusty, or hardened skin on the nipple that doesn’t respond to moisturizers, a burning or itching sensation that won’t resolve, a nipple that turns inward, or any blood-stained or straw-colored discharge.
Nipple discharge outside of pregnancy or breastfeeding always warrants investigation, especially if it’s spontaneous (happening without squeezing), coming from one breast only, blood-stained, brown, or crystal clear. Discharge from a single duct is more likely to indicate a problem than discharge from multiple openings. When nipple discharge appears alongside a lump, skin ulceration, or nipple inversion, get it evaluated quickly.
Simple Relief for Everyday Soreness
For garden-variety nipple pain from hormones, mild friction, or general sensitivity, the approach is straightforward. A warm or cool compress held against the area for 10 to 15 minutes can ease discomfort. Over-the-counter pain relievers like ibuprofen or acetaminophen help with cyclical hormonal pain. Wearing a well-fitting, supportive bra reduces bounce and friction throughout the day. Keeping the skin moisturized with a gentle, fragrance-free balm prevents dryness and cracking that make sensitivity worse.
If you’re breastfeeding, applying a pea-sized amount of lanolin to the nipple and surrounding areola after each feed is a widely recommended practice for comfort, even though clinical evidence hasn’t shown it speeds healing faster than time alone. The reassuring finding from research is that early postpartum nipple pain typically peaks in the first week and improves significantly by day 7 to 10, regardless of treatment.