Toddler keeps licking under bottom lip

[Matryoshka]

I don't know if this is becoming just a habit, or if there is some kind of problem causing it, but my toddler (2 years, 9 months) keeps using his tongue to lick under his bottom lip, so the top of his chin. He has done this for a while, mostly we thought it was because when he had a dummy he would dribble a bit. But recently he gave up the dummies and now i am noticing him doing it more than ever. I don't know if its just a habit or why he would do it. He's now getting a bit red there, like when you wipe your nose too much. I have started telling him not to do it, but he forgets and does it again. I was thinking maybe of putting something there, like vaseline to disencourage him, but was also thinking i probably should figure out first why he is doing it and try to stop it that way. I asked him but he doesn't know.

Has anyone else had this happen?

[Olive]

id say its partly habit partly annoying now for him, its probably dry and uncomfy so he licks it which makes it feel better for a while before it annoys him again so a never ending cycle, try putting pawpaw cream om it to promote some healing, not sure what else to try

[Matryoshka]

Thanks! he's now saying its sore, which would be from him keeping doing it. I haven't got any pawpaw here now, what about calendula?

[Olive]

id say that would be fine!!! its a vicious cycle poor thing