Ozzy Osbourne underwent another surgery on Friday (October 12th) for an infection in his right hand that forced the singer to postpone four West Coast concerts -- three in California and one in Las Vegas -- and reschedule them for 2019.

Ozzy's wife and manager Sharon Osbourne spoke about Ozzy's condition during Friday morning's edition of the CBS-TV program The Talk. She explained exactly what happened to Ozzy, saying, "(He) had a little cut on his thumb. You know when you pull the side of your nail, and he just left it. And then he hit it on a door. It started to get bigger and bigger, and then his middle finger, the same thing happened."

She continued, "From a tiny thing here on the side of his nail, it had turned into two different infections in his hand." Sharon added, "He had to have this operation where they cut the side of his thumb and (the middle) finger and they had to get rid of the infection. It's been from something you think is absolutely nothing. It's unbelievable."

All four postponed shows are part of Ozzy's "No More Tours 2," a trek billed as the 69-year-old singer's official farewell to lengthy world tours after five decades. Sharon said Ozzy was unhappy about missing the gigs, remarking, "He's so upset. He feels he's let down his audience, but I hope that everyone understands, and he's gonna be back."

Ticketholders for the four shows should hold on to their tickets, as they will be honored for the rescheduled dates. Refunds are also available at point of purchase. Ozzy is next scheduled to perform in Europe and Australia in February and March of next year.