Milk Bleb: What It Is and How to Treat It

Published: March 5, 2026

Last Updated: March 5, 2026

What is a milk bleb?

A milk bleb (also called a nipple bleb or “milk blister”) is a small yellow, white, or clear bump that can appear on the nipple and indicates an inflamed milk duct that is blocking a nipple pore (the tiny opening where milk exits the breast). Milk blebs can be very painful, often with sharp or shooting pains that start during or after feeds.

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Key Points

✔ Inflammation is the culprit 

A milk bleb is a painful white, yellow, or clear bump on the nipple that indicates an inflamed milk duct, rather than just "stuck" milk.

✔ Never pop it

Avoid the temptation to squeeze, pick, or pop a milk bleb, as this can worsen the inflammation, cause scarring, and increase the risk of infection.

✔ Focus on safe relief

Treat the bleb by reducing inflammation with cold compresses and NSAIDs (like ibuprofen) if safe for you to take, while continuing to breastfeed or pump as you normally would.

What causes a milk bleb?

While many people believe a bleb comes from some milk getting stuck in a milk duct, it’s actually caused by inflammation. 

Common contributing factors include:

Milk bleb vs. thrush

Thrush is a yeast infection caused by Candida albicans, and it can affect both the breastfeeding parent’s nipples and the baby’s mouth. Symptoms include burning, itching, or deep stabbing breast pain; the nipples may look pink, shiny, flaky, or cracked; and often both breasts are affected. The breastfeeding baby may have white patches inside their mouth that don’t wipe off, a diaper rash, or be extra fussy during feedings. Thrush is an infection and can pass back and forth between parent and baby.

Treatment for thrush includes antifungal medication for both parent and baby, while breastfeeding continues without disruption. If you suspect you and/or your baby have thrush, consult your medical provider. 

How to treat a milk bleb

Don’t: Try to pop the milk bleb or “unroof” it. This can traumatize the nipple and worsen the inflammation, which can cause scarring or can lead to the bleb coming back. Digging or opening the skin covering the pore can also increase tissue trauma and infection risk.

Instead: Reduce inflammation by…

And focus on removing milk as normal from the breast by…

If a bleb doesn’t go away on its own, a clinician may prescribe a steroid cream to reduce localized inflammation

When to get medical help urgently

Contact your medical provider if you have:

Frequently Asked Questions

What’s the difference between a milk bleb and a blister?

While a milk bleb is often called a “milk blister,” friction blisters are not the same as milk blebs and are common while breastfeeding. A friction blister is a skin injury, not a milk-flow problem. A friction blister looks like a fluid-filled bubble that is skin-colored or see-through. They tend to be bigger than a bleb, and may break or peel on their own. Friction blisters are associated with stinging or burning on the skin and pain during latching or when the baby is rubbing against it. A friction blister is often caused by poor latching.

Do milk blebs go away by themselves?

Yes—many milk blebs do go away on their own, especially if milk is flowing well and the underlying cause (like latch or pressure) is addressed. Make sure baby (or the pump) is effectively draining the breast and there is no ongoing nipple trauma. 

How long does it take for a milk bleb to go away?

Mild blebs may resolve in a few days, with some lasting one or two weeks. If you are experiencing blebs consistently, reach out to an IBCLC for an assessment. 

Is it safe to breastfeed while having milk bleb?

Yes, it is safe and recommended to continue breastfeeding with a milk bleb. 

Can I squeeze out a milk bleb?

While so tempting, don’t pop or pick at a milk bleb! This can cause more inflammation and possibly infection.

What happens if I popped a milk bleb?

While you may feel some immediate relief and see some thickened milk come out, you will likely also have an open wound on the nipple which may feel raw, tender, or even develop a scab. 

What does a popped milk bleb look like?

Immediately after popping a milk bleb, the appearance changes from a raised white dot to more of a small open wound. You will likely see a small raw or red spot and a tiny open pore where the white dot used to be. You may also see a drop of thick or stringy milk, some slight bleeding, and many times the spot is tender to the touch. 

As it heals, a small scab may develop, or the skin will remain pink. Some mild peeling is also common. If healing normally, redness should stay localized and pain should gradually improve.

Should I pump if I have a milk bleb?

If you typically pump to express breast milk, continue pumping per your normal schedule to drain the breast. Do not add in additional pumping sessions or attempt to over-drain the breast, which can lead to more inflammation. If you do not regularly pump, do not add in pumping sessions. 

Why do milk blebs hurt so much?

Milk blebs can be painful! The pain is typically associated with pressure developing around the inflamed duct. This pain can feel worse during a let down or when milk flow increases as the milk attempts to move through the narrow area. Inflamed tissue is often quite sensitive to even light touch, and the nipples have a lot of nerve endings, so even small areas of inflammation can feel very painful.

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Written By

K. Grenawitzke, OTD, OTR/L, SCFES, IBCLC, CNT, Pediatric Feeding & Swallowing Specialist

K. Rappaport, OTR/L, MS, SCFES, IBCLC, Pediatric Feeding & Swallowing Specialist