Aerosmith were forced to cancel a number of dates on their South American tour last week after frontman Steven Tyler was suddenly hospitalised.
They released a statement explaining that "due to unexpected medical issues, lead singer, Steven Tyler, is seeking immediate care and has been advised by his doctors that he cannot travel or perform at this time."
There was speculation that Tyler had suffered a seizure and had been rushed to hospital, but now the rocker claims that this is not true.
"I give you all an A+ for creative speculations but I certainly did not have a heart attack or a seizure (unless Joe Perry is takin' a rippin' lead)," he wrote on the band's official site. "Sorry to have cut the tour short but I had to have a procedure that only my doc in the States could perform."
He added: "It breaks my heart to have left this tour early. The band has never played better. Just watch the 100,000 people at Rock in Rio. We've been to Tel Aviv… to Russia… to Rio… and all the in between… I guess it's true what they say, 'That life's a pisser when eu're a peein'.'"