I have this rash on the side of my mouth, just one side... Its been there for 3 month now and its up and down. At worse its realy red, bumpy, itchy. Now its slightly discolored but thats about it. I feel like when I drink a lot of water, it gets better and after I eat popcorn it gets worse.

Any ideas? I try to drink as much water as I can and it generally gets better, its the only idea I can think of. But if I go through a day without drinking a lot of water, it gets worse agian.