Nipple pain when you squeeze or press on the area is common and usually caused by something benign, like hormonal shifts, friction, or minor tissue changes. The nipple has a dense concentration of nerve endings, which makes it especially responsive to pressure. That said, the cause can vary depending on your age, sex, whether you’re breastfeeding, and what other symptoms you notice alongside the pain.
Hormonal Fluctuations Are the Most Common Cause
If you menstruate, the most likely explanation is cyclical breast pain tied to your menstrual cycle. During the luteal phase (roughly the two weeks before your period), rising progesterone levels cause breast tissue to swell. The milk ducts expand, the tissue around them retains fluid, and the small lobules in the breast enlarge. All of this creates internal pressure that makes the nipple and surrounding area tender to the touch. You might not notice it during everyday activities, but squeezing concentrates force on tissue that’s already swollen and sensitized.
This type of pain tends to affect both breasts, feels worst in the days before your period, and eases once bleeding starts. It’s considered a normal physiological response, not a sign of disease. If you track when the tenderness shows up, you’ll likely see it follows the same pattern month to month.
Friction, Irritants, and Skin Reactions
Sometimes the pain isn’t coming from inside the breast at all. The skin on and around the nipple is thin and easily irritated, and squeezing inflamed skin amplifies the discomfort. Common physical triggers include ill-fitting bras that rub against the nipple throughout the day, rough fabric, and moisture trapped under padded bras or nipple covers.
Chemical irritants are another overlooked cause. Laundry detergent, fabric softener, soaps, and even fabric dyes can trigger contact dermatitis on the nipple. Nickel and cobalt, metals sometimes found in bra underwires or the base of silver-plated nipple shields, are among the most frequent causes of allergic skin reactions in this area. If your nipples look red, flaky, or slightly cracked in addition to hurting when touched, an external irritant is worth investigating. Switching to a fragrance-free detergent or a different bra material can resolve the issue within a week or two.
Pregnancy and Breastfeeding
Nipple tenderness is one of the earliest signs of pregnancy, often starting in the first trimester before you even miss a period. Rapidly rising hormone levels cause the breast tissue to swell and the nipples to become hypersensitive. Squeezing or even brushing against clothing can feel surprisingly painful during this window.
During breastfeeding, nipple pain from pressure has a different set of causes. A poor latch is the most common, but yeast infections (thrush) on the nipple are another possibility. Thrush typically produces a burning or sharp, stabbing pain that can radiate into the breast during or after feeding. The nipple may look pink, shiny, or develop visible cracks or flaking. Research suggests the combination of shiny or flaky nipple skin alongside breast pain is the strongest predictor of a yeast-related cause. If you’re breastfeeding and notice these signs together, treatment for both you and your baby is needed to prevent reinfection.
Benign Growths Inside the Duct
If the pain seems focused in one specific spot, particularly right behind or next to the nipple, a small growth inside the milk duct could be the source. Intraductal papillomas are noncancerous tumors that develop in the large ducts near the nipple. They sometimes cause a clear or bloody discharge, and they can be painful, especially when you press directly on them. You may feel a small, distinct lump in the area.
Another possibility, especially for women between 45 and 55, is duct ectasia. This happens when a milk duct widens and its walls thicken, sometimes filling with fluid. It can cause nipple tenderness, a thick discharge, and mild redness or swelling near the areola. Both conditions are benign, but they’re worth having evaluated because the symptoms overlap with more serious issues.
Medications That Cause Breast Tenderness
Several common medications list breast or nipple pain as a side effect. Oral contraceptives and estrogen replacement therapy are frequent culprits because they directly alter hormone levels. SSRIs (a class of antidepressants that includes fluoxetine), certain blood pressure medications, water pills, and antipsychotic medications can also cause breast tenderness. If your nipple pain started around the same time you began a new medication, that connection is worth raising with your prescriber.
Nipple Pain in Men
Men experience nipple pain from pressure too, and the most common cause is gynecomastia, an enlargement of breast tissue that affects over 50% of males at some point in their lives. It typically feels like a firm, button-sized growth right beneath the nipple that’s tender when pressed. The underlying driver is usually a hormone imbalance, with estrogen levels rising relative to testosterone. This can happen naturally during puberty and aging, or as a side effect of certain medications.
Gynecomastia is benign, but it’s worth noting that male breast cancer, while rare, can also present as a lump in the breast tissue. If the lump feels hard, is fixed in place rather than mobile, or the skin around it looks different, getting it checked is important.
Signs That Warrant a Closer Look
Nipple pain alone, especially when it only shows up with deliberate squeezing, is rarely a sign of cancer. But certain secondary symptoms shift the picture. The CDC lists these warning signs for breast cancer: a new lump in the breast or armpit, skin dimpling or puckering, redness or flaky skin on the nipple, nipple retraction (pulling inward), bloody or unusual discharge, and any change in breast size or shape. Pain in any area of the breast is also on the list, though the agency notes these symptoms frequently occur with noncancerous conditions.
If your pain is focused in one spot, doesn’t follow a cyclical pattern, and persists for more than a couple of weeks, imaging can help rule out structural causes. For women under 30, ultrasound is the standard starting point. For those 30 to 39, either a mammogram or ultrasound works. For women 40 and older, a mammogram is recommended first, with ultrasound added if needed for a clearer picture. When nipple pain comes with a lump or discharge, the workup follows those symptoms rather than the pain itself.