Licking lips

My 3 year old daughter is constantly licking her lips, and therefore constantly has an area of skin under her bottom lip that is red and irritated. I put aquaphor on at night, and I think it helps a little, but I’m wondering if anyone knows of anything that might be more effective. Probably because she licks so much her lips are pretty chapped too. Also, I know stopping licking would be a solution, and we are working on it with reminders and lots of oral motor/oral stimulation activities because I believe she seeks out oral motor input, but it continues to be a problem. It looks like it would be sore😔