It looks like 2012 isn’t going to be the year John Mayer thought it would.

After spending the last two years battling granuloma, a growth that forms where the vocal cords connect and can be a career-ruiner for singers, Mayer announced that he had made a full recovery and would be going on a world tour to promote his upcoming album Born and Raised, but his health has taken a turn for the worst.

Mayer wrote in his blog that during a rehearsal with the band, he was hit with a realization that he should see his doctor as “something didn’t feel/sound right,” and he’s lucky he did, because they made a pretty important discovery:

“I went in for a visit [to my doctor] on Wednesday and a scope of my vocal cords revealed that the granuloma has grown back where it had mostly healed. This is bad news. Because of this, I have no choice but to take an indefinite break from live performing… It will sideline me for a longer period of time than I care to have you count down.”

So what’s that mean for the tour? You guessed it– Cancelled.

Mayer goes on to say that Born and Raised will be released as scheduled and he will take the time he would have spent on touring to write another new album.

“I’m pretty emotionally burnt out at the moment, but please know how hard I tried to resolve this and how disappointed I am that I can’t perform this record yet. I’m completely bummed, especially for all of you who started making plans to see a show. Nothing feels worse than having to break the stage down before the performance, and I mean nothing. I love this band you were going to hear, I love the guys and girls I work with, and the only thing that stops me from devolving into a puddle of tears is knowing that it’s a long life, and the greatest gift in the world is being able to create music no matter what the circumstances. So these are the new circumstances, and I’ll find a way to make it mean something. That’s all you can ever do.”

How sad!

If you haven’t yet, check out the first single off of the new album, Shadow Days, below. We think this would have sounded GREAT live– What do you think?