In a statement posted on the band's official website, Tyler downplayed any major health woes.
"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 taking' a ripping' lead). Sorry to have cut the tour short but I had to have a procedure that only my doc in the States could perform.
"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 peeing''," Tyler wrote.
Aerosmith currently have no tour dates on their upcoming slate.