06/03/2026
Newborn lip blisters can be caused by how your baby feeds or sucks their thumb, or they can be due to an infection. The treatment for each of these is different, so it’s important to know what’s what.
Out of tiny baby lips come gentle coos, sleepy yawns and needy cries. But wait ... what’s that blister on baby’s lip? Should you worry? That depends on what the blister looks like. A pediatrician explains.