He explained: "Steven cannot put himself under the rigors of doing a full worldwide tour because there’s a lot of pressure. And if you’re not a singer, you wouldn’t understand what he goes through, but he’s 77 years old and he’s a perfectionist.

Aerosmith frontman Steven Tyler recently performed live for the first time since suffering a vocal injury at the Jam for Janie fundraising event

"Steven cannot put himself under the rigors of doing a full worldwide tour because there's a lot of pressure," Sorum explained.

"If he doesn't sing correctly, it bothers him," Matt Sorum said of the Aerosmith frontman Despite a recent performance, Steven Tyler won't tour again. During an interview published on Feb. 13 with local radio station WBAB,