Chapped lips?

I noticed that Savanna is getting pink raw spots on her lips. They're dime-sized and don't seem to bother her when I touch them, and they are not in an area where the bit would interfere. It literally looks like she has chapped lips. Any idea what this might be?

Could be ringworm. Horses don't normally get chapped lips.

Sunburn? That looks chapped.

Right?? Lol that's what I was thinking, that horses don't get "chapped lips" but that's what it looks like. I'll have to research the ringworm thing. Thanks for the tip!

I thought of that too, but she isn't really in the sun enough for that to be an issue. When she WAS out in the sun, it never happened. Now that she's in a stall, her lips have little pink raw spots and there are a few crusty areas next to her right nostril.

I recently put a mineral block in her feed bucket to stop her from eating so quickly. I wonder if she's having a bad reaction to it?

Oh, didn't know she was inside. Is her feed bucket clean?