Kind of freaked myself out on Sunday when I glanced at my tongue in the mirror.
Yuck! Mine looks most like the left picture's right side. I have no idea how long it has been there, don't routinely do tongue checks.
Dr. Google tells me that it is called a geographic tongue. I gather the cause is as basic as breathing, or perhaps a virus, dietary issue, stress, you name it.
Here's a thorough description.
For your entertainment pleasure, and just b/c the tongue takes really funny pictures, here are more cases.
Further, b/c pictures of a sick, but not sick, tongue are grossly entertaining, here are even more cases.
Apparently it comes and goes rather mysteriously, but I should expect it to last a couple weeks.
Anyone else been thusly blessed as well?