Blisters on Nipples

Blisters, milk blisters, blebs and white spots are discussed in this article with links to further reading and ideas to resolve them. Contacting your health professional will help confirm the cause of the white spot or blister if you are not sure.

Friction blisters

A clear blister or red/brown ‘blood blister’ on the nipple is usually caused by friction or high vacuum just like a blister anywhere else on the body. A blister may form if your baby is in a shallow latch so pay careful attention to positioning (see our articles Breastfeeding Positions for Newborns and Latching Tips). Blisters on nipples may also form from a badly fitted nipple shield or pump. Once the source of the friction has been found the blister should quickly heal on its own. If the blister bursts before it has healed beneath and you have sore broken skin on your nipple check out Treatments for Sore Nipples and Kelly Bonyata has some Healing Tips for Nipple Cracks or Abrasions.

Milk blisters or blebs

If thickened milk or a thin layer of skin blocks one of the openings of the nipple, it may cause a white spot on the nipple. This is called a bleb or milk blister. A bleb that doesn’t hurt may disappear on its own in a few weeks or months. But if the bleb is stopping milk flow it can cause pain or be associated with engorgement or mastitis.

A bleb is a little white spot on the tip of a nipple that looks as if there’s milk stuck in a nipple pore. Maybe there’s a bit of skin over the surface of it, maybe not. Maybe there’s a plugged duct in your breast behind it, maybe not. but it can hurt when your baby nurses, like squeezing a pimple. Ow! When you get rid of a a bleb, the contents may come out as little granules that you can feel between your fingers, or as a tiny ribbon like toothpaste. Or it may just disappear during a nursing (going harmlessly into the baby). Once it’s gone, any backed-up milk generally clears quickly.


The Womanly Art of Breastfeeding has lots of ideas to free the blockage including making the plug smaller, softening the nipple pore, opening the skin over the pore and treating the plug higher up. They suggest washing once a day with soap and water and using a little antibiotic ointment for a few days:

Make the plug smaller. Soak a cotton ball in vinegar and wear it over your nipple inside a bra. Milk has a lot of calcium in it, and vinegar dissolves calcium deposits.

Make the nipple pore softer. Soak in the tub or shower, then soak a cotton ball in water, olive oil, or canola oil (corn or peanut oil could encourage allergies) and wear it in your bra over your nipple. Putting some gentle heat over the cotton ball—a sock filled with rice and heated in the microwave, for instance—may help. Or soak your nipple in a cup of warm water to which you’ve added 2 teaspoons (10g) of Epsom salts. Then see if nursing, gentle manipulation, or pressure from behind will squeeze the thickened milk out.

Open the skin over the pore. You can ask your health care provider to open it gently with a sterile needle, or do it yourself with a well-sterilised (in a candle flame, for instance) needle. Pick carefully at it from the side; that top layer of skin should have no feeling in it, but the skin underneath may be sensitive. You can use sterile tweezers to peel back any tiny flaps of skin that cover the opening. Manipulate your nipple or have your baby nurse to remove the bleb.

Stubborn cases

Nipple blebs may be an inflammatory reaction to nipple damage in some women. In Are There Any Cures for Sore Nipples? Marsha Walker discusses a study that looked at blebs that didn’t respond to traditional treatment. In this study the author recommended a short course of a mid range topical steroid to penetrate into the inflamed tissue around the bleb 1.

Sometimes the cause of the nipple bleb could be associated with a blocked duct deeper in the breast see Blocked Milk Duct for ideas for treating a blocked duct.

White nipple spots that aren’t blebs?

There can be other causes of white spots on nipples including a build up of dead skin or a wound; for example saliva and milk moisture under the skin from baby biting the nipple. (Described in Breastfeeding Answers Made Simple.)

Thrush and white spots?

Occasionally thrush (a fungal infection) may look like little white blisters on the nipple. Check with your Health Professional and find further reading in our Thrush on Nipples article. Kelly Bonyata discusses how thrush can occasionally cause milk blisters in the following article:

Thrush (yeast), can also cause milk blisters. Thrush occasionally appears as tiny white spots on the nipple, but can also appear as larger white spots that block one or more milk ducts. If you have more than one blister at the same time, suspect thrush as the cause. Yeast is often accompanied by a “burning” pain, and the pain tends to be worse after nursing or pumping (whereas a plugged duct generally feels better after the breast has been emptied).

Herpes simplex viruses 1 (cold sores) and 2 (genital herpes)

Herpes could cause blisters on the nipple. Symptoms of herpes include small, painful, fluid filled, red-rimmed blisters containing viral material that dry after a few days and form a scab. As these viruses are spread by simply touching the sores, it is important that your baby doesn’t come into contact with them. Observe careful hygiene to protect your baby. Lesions can appear anywhere on the body including the breast e.g. genital herpes sores can be spread by touching the sores and then touching the breast. If the sores (blisters) are on your nipple or close by your nipple this will mean avoiding breastfeeding from that breast until they heal.

For more information see Herpes and Breastfeeding.