Nipple pain can be surprisingly uncomfortable — and when it happens on only one side or lasts for several days, it can also feel worrying.
The good news is that most nipple pain is caused by benign conditions.
Hormonal changes, friction, skin irritation, pregnancy, breastfeeding, and inflammation are common causes.
However, persistent nipple pain accompanied by a lump, discharge, or visible nipple changes deserves evaluation.
What Can Cause Nipple Pain?
Common causes include:
- Hormonal changes
- Friction from clothing or exercise
- Dry or irritated skin
- Eczema or dermatitis
- Pregnancy
- Breastfeeding
- Infection or inflammation
- Trauma
- Breast cysts or other nearby breast conditions
Less commonly, nipple pain may occur with more significant breast disease.
Can Hormones Make Your Nipples Hurt?
Yes.
Hormonal fluctuations during the menstrual cycle can make the breasts and nipples feel:
- Tender
- Sensitive
- Sore
- Heavy
- Swollen
Symptoms often appear before menstruation and improve after the period begins.
If nipple pain follows a predictable monthly pattern, hormonal changes may be contributing.
Can Friction Cause Nipple Pain?
Absolutely.
Repeated rubbing against clothing can irritate the nipple.
This is particularly common with:
- Running
- Long workouts
- Tight bras
- Rough fabrics
- Poorly fitting sports bras
The nipple may become tender, red, dry, or even slightly cracked.
Reducing friction and allowing the skin to heal often improves the symptoms.
What About Dry Skin or Eczema?
The nipple and areola are covered by sensitive skin.
Dermatitis or eczema can cause:
- Itching
- Dryness
- Flaking
- Redness
- Burning
- Cracking
- Soreness
Soaps, detergents, lotions, fragrances, and clothing materials can sometimes trigger irritation.
Persistent or unusual nipple skin changes should still be evaluated rather than automatically assumed to be eczema.
Can Pregnancy Cause Sore Nipples?
Yes.
Breast and nipple tenderness can occur early in pregnancy because of hormonal changes and increased blood flow.
The nipples may become:
- More sensitive
- Tender
- Slightly enlarged
The areola may also become darker.
These changes can occur as the breasts prepare for breastfeeding.
Why Do Nipples Hurt During Breastfeeding?
Nipple soreness is common during breastfeeding, especially early on.
Possible causes include:
- Latch problems
- Friction
- Cracked nipples
- Milk blisters
- Engorgement
- Blocked ducts
- Mastitis or other inflammation
Severe or persistent pain should be assessed because correcting the underlying cause can make breastfeeding much more comfortable.
Can Infection Cause Nipple Pain?
Yes.
Infection or inflammation may cause nipple or breast pain along with:
- Redness
- Warmth
- Swelling
- Tenderness
- Discharge
- Fever in some cases
Prompt medical evaluation is appropriate when symptoms are rapidly worsening or accompanied by fever or significant redness.
Does Nipple Pain Mean Breast Cancer?
Usually not.
Nipple pain by itself is not a typical presentation of breast cancer.
Most nipple pain has a benign explanation.
However, pain should be evaluated when it occurs with other changes such as:
- A new breast lump
- Bloody nipple discharge
- New nipple inversion
- Persistent crusting or scaling
- Ulceration
- Skin thickening
- A persistent one-sided nipple change
The combination of symptoms matters more than pain alone.
What Is Paget Disease of the Breast?
Paget disease of the breast is a rare condition involving the nipple and is usually associated with an underlying breast malignancy.
Possible symptoms include:
- Persistent redness
- Scaling or crusting
- Itching or burning
- Nipple flattening or inversion
- Discharge
- A sore or ulcer that does not heal
These symptoms can resemble eczema.
The important difference is that persistent, especially one-sided, nipple skin changes should be medically evaluated.
Having irritated nipple skin does not automatically mean Paget disease.
What If Only One Nipple Hurts?
One-sided nipple pain can still have a benign cause.
For example:
- Local skin irritation
- Friction
- Minor trauma
- Infection
- A nearby breast cyst or duct-related condition
But if one-sided nipple pain persists without an obvious explanation, particularly when accompanied by discharge or visible nipple changes, evaluation is reasonable.
Can Breast Ultrasound Help?
Sometimes.
Ultrasound does not primarily evaluate the surface skin of the nipple, but it can examine the breast tissue and ducts beneath the nipple.
It may help identify:
- Dilated ducts
- Cysts
- Solid masses
- Fluid collections
- Other abnormalities behind the nipple
This region is called the retroareolar area.
What If There Is Nipple Discharge Too?
Nipple pain accompanied by discharge deserves additional attention.
Discharge is generally more concerning when it is:
- Spontaneous
- From one breast
- From a single duct
- Bloody or clear
- Persistent
The evaluation may include breast ultrasound, diagnostic mammography, or other testing depending on the situation.
When Should Nipple Pain Be Checked?
Consider medical evaluation if nipple pain:
- Persists or worsens
- Is consistently one-sided
- Has no obvious explanation
- Occurs with a new breast lump
- Occurs with spontaneous or bloody discharge
- Is associated with new nipple inversion
- Occurs with persistent scaling or crusting
- Is accompanied by redness, warmth, or swelling
- Occurs with a nipple sore that does not heal
Rapidly worsening redness, swelling, severe pain, or fever should be evaluated promptly.
What Can I Do for Mild Nipple Irritation?
If symptoms appear related to friction or mild irritation, simple measures may help:
- Avoid irritating soaps or fragrances
- Wear a comfortable, properly fitting bra
- Reduce friction during exercise
- Keep irritated skin protected
- Avoid repeatedly touching or squeezing the nipple
If symptoms do not improve, have them evaluated.
The Bottom Line
Most nipple pain is caused by benign conditions such as hormones, friction, skin irritation, pregnancy, breastfeeding, or inflammation.
Pain alone usually does not indicate breast cancer.
What deserves more attention is persistent nipple pain combined with a new change, especially:
lump + discharge + inversion + persistent skin change
If something about your nipple looks or feels different and does not improve, appropriate evaluation can help determine the cause.
Don’t judge nipple symptoms by pain alone — pay attention to what else has changed.
This article is for general educational purposes and is not a substitute for professional medical advice, diagnosis, or treatment.
