This is very common in kids that use pacifiers or lick their lips a lot. We call it “lip-licker’s dermatitis” (it’s in the dermatology textbooks!). The cure is to stop licking your lips, or get rid of the pacifier, but that can be tough. I am a big fan of Aquaphor or Lansinoh ointment for this type of problem.
“My son is 7 1/2 months old and seems to have chapped lips. It is red on the right side of his mouth, on the upper lip. It does not seem to bother him, but I feel the pacifier (only uses to go to sleep) is irritating it. Is there anything we can use to “treat” the chapped lips? For example, Aquaphor or Chapstick?”