Baby Blister on Lip from Nursing
The short answer
A nursing blister (also called a suck callus) is a small, painless blister or thickened patch on your baby's upper lip caused by the friction of latching during breastfeeding or bottle feeding. It is completely harmless, does not hurt your baby, and does not need any treatment. These are very common in newborns and typically come and go in the early weeks.
By Age
What to expect by age
Nursing blisters are most common in the first few weeks of life when feeding is frequent and the latch is new. You may see a small white or clear blister on the center of the upper lip, or the skin there may look thickened and callused. Some babies are even born with a suck blister from sucking their hands in the womb. It is completely painless and does not affect feeding.
As feeding becomes more established, nursing blisters typically become less frequent. If a new blister appears, it is still just from the normal friction of feeding. Do not pick at or pop the blister - it will resolve on its own. If your baby is feeding well and gaining weight, no action is needed.
Nursing blisters are uncommon at this age as the lips are tougher. If you see a new blister on the lip at this stage, consider whether it could be a cold sore (herpes simplex), which looks different - typically fluid-filled, painful, and may be accompanied by fussiness or fever. A true nursing blister is painless and centrally located on the upper lip.
What Should You Do?
When to take action
- A small, painless blister or thickened skin on the center of the upper lip in a breastfed or bottle-fed baby
- The blister peels and reforms periodically in the early weeks
- Baby feeds normally and does not seem bothered by the blister
- Blister appears shortly after birth or in the early weeks of life
- You are unsure whether the blister is a nursing blister or something else like a cold sore
- The blister seems painful, is red around the edges, or is filled with cloudy fluid
- Blisters appear in multiple locations on the lips or inside the mouth
- Your baby develops blisters along with fever, extreme fussiness, or refusal to eat - this could indicate a herpes infection, which requires urgent medical evaluation in infants
- Blisters are widespread on the face, mouth, or body, or the baby seems unwell
Sources
Related Resources
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