Grammy Award-winning musician John Mayer announced Friday that he is canceling his upcoming tour, which would have been kicked off with a show at Indiana University.

Mayer wrote on his blog that he went to see his doctor after having difficulties during rehearsal.

"I went in for a visit on Wednesday and a scope of my vocal cords revealed that the granuloma has grown back where it had mostly healed," Mayer wrote.  "This is bad news. Because of this, I have no choice but to take an indefinite break from live performing."

Mayer had previously delayed the release of his album Born and Raised because of the same vocal chord issue which led to surgery on his vocal chords last October.  He says the album will still be released on May 22nd as planned.  His first single "Shadow Days" was released on March 5th. While he recovers, Mayer says he will begin work on his next album, although he says another surgery will happen during that time.

"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," Mayer said.  "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."

Mayer was slated to officially kick off his 2012 spring tour in Bloomington at Indiana University Auditorium on April 9.  He was also scheduled to play at Purdue's Elliott Hall of Music on April 13th.