Clapton, 71, said damage to his nervous system had made it hard for him to play the guitar because of the illness.

"I've had quite a lot of pain over the last year. It started with lower back pain, and turned into what they call peripheral neuropathy - which is where you feel like you have electric shocks going down your leg," he told Classic Rock magazine.

"And I've had to figure out how to deal with some other things from getting old.''

For years Clapton, whose career encompassed playing with John Mayall, Cream and the first "super group" Blind Faith, lived a life of rock and roll excess.