Prevention and Treatment of Nipple Blisters

Have a milk bleb? These tiny but mighty troublemakers can make every latch feel like a sting and leave you wondering what suddenly changed. The good news is that milk blebs are common, manageable, and usually temporary when addressed properly.

1. A milk blister, sometimes called a bleb, is caused by skin that grows over and blocks a milk duct. Often it looks like a small, white dot, which fills with milk when expressed. These blisters can be persistent and very painful, especially when a baby latches. They often coincide with plugged ducts.

2. Blisters can result from excess friction related to an improperly fitted flange during pumping or a poor latch during breastfeeding. In this case, the underlying issue needs to be resolved, while following appropriate nipple wound care.

3. Herpes Simplex Virus can also cause blisters on the nipple or breast. If you have a history of HPV and believe your nipple or breast may be infected, stop breastfeeding and contact a physician immediately. Yeast, allergy, or a bacterial infection are other causes that require medical attention.

• Frequent, efficient, and thorough milk removal.

• Have your baby’s oral function and latch assessed by a knowledgeable IBCLC. Once your baby is latched, they use their lips to form a seal at the breast as the tongue extends out over the bottom gum line and cups the areolar tissue. The baby takes a large portion of areolar tissue and the nipple in their mouth and begins to use their jaw, face, and tongue muscles to move milk from further back in the ducts towards the nipple with positive pressure of the tongue pressing the breast into the roof of the mouth. 

The nipple should extend back to where the hard and soft palate meets. Here, the nipple is pressed into the softer tissue of the soft palate rather than the harder front section of the roof of the baby’s mouth. As the baby lowers their tongue and jaw, a vacuum occurs, and milk sprays out of the nipple pores for the baby to drink. Milk blebs can form when the baby uses their tongue differently, compensating for being unable to move their tongue completely and ineffectively removing milk.

• When pumping, make sure you are using correctly sized flanges and using your hands to encourage milk removal. You can use a food grade oil or Pumping Spray before each pump session to lubricate the flange tunnel and reduce friction and rubbing on the nipple.

• According to IBCLC Jennifer Tow, chronic inflammation, a leaky gut, and food intolerances can lead to recurring milk blisters and plugged ducts.

• Since milk blisters and plugged ducts tend to be related, treat plugged ducts appropriately and promptly.

• Apply moist heat by using a very warm shower, wet washcloth, or by soaking your nipple in a salt water solution of ½ teaspoon of salt and 8oz of warm water for 5 minutes. Warm olive oil placed on a cotton ball or cloth can also be used to soak your nipple. Specific instructions are available in this video.

• Castor oil compresses can also help relieve inflammation and soften a blister.

Cut a piece of cotton flannel to a size big enough to cover the area you will be using it on. Soak the cotton flannel cloth in castor oil. You want the cloth to be saturated, but not dripping. Apply the cloth to the affected area. Cover the cloth and a little extra area with plastic wrap to help hold it in place. This will also help keep the oil more contained. Castor oil is quite messy and will stain, so don’t wear your favorite shirt. Next, put a heating pad or hot water bottle over the castor oil pack. The heat will feel nice and is helpful in reducing the inflammation. After you are done with the pack, wash your skin with warm soapy water.

• After applying moist heat or immediately after nursing/pumping, gently rub your nipple and the blister with a washcloth. This may need to be repeated several times. If the skin does not come away from the blister, your lactation consultant or physician may need to scrap it with a sterile instrument. As soon as the blister opens, hand express or breastfeed to move milk. Normally immediate relief is felt.

• After releasing a blister, wash with mild soap a few times a day. Some moms use a topical antibiotic. Medihoney or silver hydrosol spray are natural ways to prevent infection.

• Continue to breastfeed, using ideal positioning at the breast, massage, and compressions. Hands on pumping and hand expression can also help. Frequent and thorough milk removal is important.

Using your hands, gently stroke the whole area of the chest and move your breast around to encourage milk to flow if there are any clogged ducts happening at the same time. Lean forward and let gravity help with the release. 

Reducing processed and sugary foods and replacing them with nutrient dense anti inflammatory foods can also help support your body.

Sunflower lecithin is a natural supplement that can help clear those stubborn blockages and prevent them from developing into mastitis. Sunflower lecithin is an emulsifier. Its properties play a role in brain development for your baby and can support overall health. 

If you have a fever, severe swelling or pain, are not seeing improvement within 8-24 hours, or the symptoms worsen and are severe, please contact an IBCLC (International Board Certified Lactation Consultant) and your physician.

Milk blebs can be incredibly uncomfortable, but they are also very responsive when you address the root cause. The key is not just clearing the surface blister, but asking why it formed in the first place. Friction from a shallow latch, unresolved inflammation, oversupply, pump trauma, or lingering clogged ducts can all contribute. When you support effective milk removal, reduce inflammation, and protect nipple tissue, blebs are far less likely to return.

Resist the urge to aggressively pick or “pop” a bleb on your own. While it can be tempting, trauma to the nipple can worsen inflammation and set up a cycle of recurrence. Gentle, evidence based care paired with skilled lactation support will always serve you better than quick fixes.

If blebs are recurring, unusually painful, or paired with deeper breast pain or frequent clogs, that is your cue to dig deeper with an IBCLC. Your body is giving you information. With the right support, you can restore comfort, protect your milk supply, and get back to feeding without wincing.