It's really hard to explain, but I'll try... :)
I use german silver french eggbutt on my horse. I noticed recently that somehow one side of mouth (left) gets very wet. Not quite mouth, but skin right behind the mouth. Looks like it's get wet and bit kinda rubbing it. No sores as of yet, and I cleaned the skin with the wet napkin afterwards and put some vet cream, but it concerns me. Is it normal? Should I do something to prevent it?