Mayer, 40, who has been touring this fall with the Dead & Company, had been due to perform in a concert Dec. 5 in New Orleans. But that concert date has been postponed, Dead & Company announced via Twitter.
"Information on the rescheduled date will be announced as soon as possible," Dead & Company added.
Mayer, a Grammy-winning guitarist and singer, grew up in Fairfield. He performed Sunday night with the Dead & Company, which is a Grateful Dead offshoot.
Bandmate Bob Weir posted a photo on Twitter with Mayer, saying, “Wishing a speedy recovery for John. Get well soon my friend.”
“John, get well soon brother!” bandmate Oteil Burbridge posted on his Twitter.
The tour with the Dead & Company was expected to finish up Friday in Sunrise, Fla. There has been no word on the Dec. 7 and 8 concert dates.
Mayer released his seventh solo album, "The Search for Everything," this year.
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