Sore nipples when touched usually come down to hormonal shifts, friction from clothing, or skin irritation. These are the most common causes by far, and most resolve on their own or with simple changes. Less often, the soreness signals an infection, a medication side effect, or something that needs medical attention. Here’s a breakdown of what might be going on.
Hormonal Changes
Hormones are the single most common reason nipples become tender to the touch. Estrogen and progesterone fluctuate throughout your menstrual cycle, and both affect breast tissue. Many people notice their nipples are most sensitive in the days leading up to their period, when progesterone peaks. This type of soreness is usually symmetrical (both sides) and fades once your period starts.
If you’re pregnant, nipple tenderness can show up surprisingly early. Breast changes typically begin between four and six weeks of pregnancy but can start as early as two weeks after conception. Increased blood flow and rapidly rising hormone levels make the tissue swell and become hypersensitive. For some people, sore nipples are the very first sign of pregnancy, appearing before a missed period.
Perimenopause brings its own version of this. As estrogen levels become erratic in the years before menopause, breast and nipple tenderness can come and go unpredictably. Hormonal contraceptives and estrogen replacement therapy can also trigger soreness, since they directly change your hormone environment.
Friction and Chafing
If the soreness feels raw, stinging, or surface-level, friction is a likely culprit. Each time clothing shifts across your chest, it creates tiny amounts of abrasion. Over thousands of repetitions (during a long run, hike, or even a full workday), that adds up. Runners know this as “jogger’s nipple,” but it happens to anyone whose clothing rubs repeatedly.
Cotton shirts are particularly notorious because they absorb sweat, get heavier, and cling to the skin, increasing friction. Cold weather makes things worse by causing nipples to become more erect and exposed to rubbing. Rough fabrics, ill-fitting bras, or going braless under a coarse shirt all raise the risk. Switching to moisture-wicking synthetic fabrics, wearing a snug sports bra, or applying a barrier like petroleum jelly or anti-chafe balm before activity usually solves the problem within a day or two.
Skin Conditions and Irritation
The skin on and around the nipple is thin and sensitive, making it prone to contact dermatitis. This is an inflammatory reaction triggered by something touching the skin: a new laundry detergent, body wash, lotion, or even the material in a bra. Allergic reactions tend to cause intense itching, while simple irritation from a product leans more toward stinging and pain. Switching to fragrance-free products and wearing soft, breathable fabrics often clears things up.
Eczema can also appear on the nipple, causing dry, flaky, cracked skin that hurts when touched. It typically affects both nipples and responds to gentle moisturizing and avoiding known triggers. If a rash on one nipple doesn’t improve with standard eczema care over several weeks, that’s worth getting checked, since a rare condition called Paget’s disease of the breast can mimic eczema but affects only one side and persists despite treatment. It’s uncommon, but it’s the reason a stubborn one-sided nipple rash shouldn’t be ignored.
What About Yeast Infections?
You may have heard of “nipple thrush,” especially in breastfeeding contexts. The reality is more nuanced than it used to be. Research shows that nipples aren’t an area where yeast typically grows. Yeast is more likely to develop in the moist skin folds under the breast or near the armpit. The redness, cracking, and shooting pain once attributed to nipple yeast infections overlap heavily with dermatitis and other causes. There’s no solid evidence that yeast infections cause the specific pain pattern traditionally associated with them, so if you suspect thrush, it’s worth exploring other explanations too.
Breastfeeding-Related Soreness
If you’re breastfeeding, sore nipples are extremely common in the first weeks. A shallow latch is the most frequent cause: when the baby doesn’t take enough breast tissue into their mouth, the nipple bears the brunt of the suction and compression. Correcting the latch usually brings rapid relief.
A less recognized cause is nipple vasospasm, where blood vessels in the nipple suddenly constrict after a feed. You may notice the nipple tip turning white, then blue or purple, then red as blood flow returns. The pain can range from mild discomfort to intense burning and throbbing, and it’s triggered or worsened by cold. Keeping your chest warm immediately after feeding, avoiding cold air on exposed nipples, and wearing a warm layer can help reduce episodes.
Mastitis, an inflammation of breast tissue, can also make nipples excruciatingly sore. Current management focuses on conservative care: feeding on the baby’s cues rather than trying to fully drain the breast, applying cool compresses to reduce swelling, and using over-the-counter pain relief. Avoiding deep massage of the affected breast is important, as it can worsen inflammation. A well-fitted, supportive bra helps with lymphatic drainage and reduces discomfort.
For cracked or abraded nipples, a simple saline soak (half a teaspoon of salt dissolved in one cup of warm water) can support healing. Evidence reviews have found that applying expressed breast milk to the nipple may be equally or more beneficial than commercial nipple creams.
Medications That Cause Breast Pain
Several types of medication list breast or nipple pain as a side effect. Oral contraceptives and estrogen therapy are the most obvious, since they directly alter hormone levels. But other, less expected drugs can also be responsible: certain antipsychotics, some blood pressure medications, water pills (diuretics), and SSRIs (a common class of antidepressants). If your nipple soreness started around the same time as a new medication or dose change, the timing may not be coincidental.
Signs That Need Attention
Most nipple soreness is benign, but a few patterns warrant a closer look. Discharge from one nipple that appears without squeezing, especially if it’s bloody or clear rather than milky, is a red flag. A persistent rash or scaly, crusty patch on one nipple that doesn’t respond to moisturizers or eczema treatment could indicate Paget’s disease of the breast, which is confirmed through a small tissue biopsy. Any new lump, dimpling, or change in the shape of one breast alongside nipple pain is worth investigating promptly.
These serious causes are rare. The vast majority of people with sore nipples are dealing with hormones, friction, or irritation. But unilateral symptoms (affecting only one side), persistent changes that don’t improve over a few weeks, or unexplained discharge are the specific signals to take seriously.