Iommi overcame lymphoma a few years back and said a few months ago that the band was no longer capable of playing long tours.
He said: “I just can’t keep going out on these long tours. Don’t get me wrong, I still love gigging. It’s the travelling and the exhaustion that goes with it that’s the problem.”
Ticket details for the tour are expected to be announced next week.
Black Sabbath will play:
Manchester Arena (January 22)
Glasgow SSE Hydro (24)
Leeds First Direct Arena (26)
London O2 (29-31)
Birmingham Genting Arena (February 2, 4)