Toddler chapped lips

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My dd has got chapped little lips from where she's been sucking her thumb. It's all red and sore under her bottom lip on her chin. Is there anything in particular I could use on her lips to help or anything I should avoid? She's always been a thumb sucker so this is a bit random!

I would pop a bit of Vaseline on or other lip-salve type thing but not a scented one. I've just been using my Vaseline mini ton thing on DS's dry lips

*tin

My dc's always suffered with this in the winter.
They would always just lick off and salve that I put on, so I would put some on about an hour after they went to bed, and some more when I went to bed.
Worked really well

Thank you :) I'll get some Vaseline tomorrow and put it on when she's asleep. I can definitely picture her licking it off otherwise