Dry lips

Hello new here but for a while now my lips have always felt dry and kinda chapped and I have this kinda different color  that comes on my bottom lips and then if I lick it and wipe it goes away then it comes back a few min later i don’t know what it could be I have tried lip balm from local Walmart but it doesn’t help  I took a pic but seems like I can’t upload on here 

What is the different colour on your bottom lip? Can you describe it?   What is your natural skin colour?

Hard to describe but i guess kinda looks like dirt or something g close to that color maybe a lighter color