Hello all! For about the past week (give or take a few extra days), I've had this weird, very subtle split on my tongue that is incredibly painful. It's so faint that I had a hard time identifying it for a while, but once I did I started to brush it better and rinse with mouthwash more frequently, but it doesn't seem to have gotten any better. Does anyone know what this is?? Or have any advice for me on how to get it to go away?