John Mayer has stopped singing -- but only for the time being.
The Grammy-winning musician, 33, has been diagnosed with granuloma, an inflamed nodule near his vocal chords, he wrote on his Tumblr blog recently.
Mayer explained to fans that he has endured "several months of going week to week monitoring and hoping to correct the condition," but he's now been advised to cancel several concert engagements, including the iheartradio Music Festival in Las Vegas and an appearance with Tony Bennett in Los Angeles.
His next album Born and Raised has also accordingly been delayed as he recuperates, he said. "The record will be released next year instead of this fall or winter.
Mayer admitted his recovery time is unknown. "This is a temporary setback, though I'm not sure how long or short a period of time it will be. I’ve got the best doctors in the country looking after me and I will be singing and touring again as soon as I get the all clear," the "Waiting on the World to Change" singer wrote. "Until then I'll be spending time writing and composing more music and kicking an empty soup can around the West Village."