ROD Stewart has sparked concern for his health as he pulled out of a second concert in a week over a mystery medical issue.

It’s been revealed 81-year-old rocker has pulled out of his August 9 gig at the Riverbend Music Center in Cincinnati.

Rod Stewart "One Last Time" Tour - WantaghRod Stewart has told fans he has no plans to fully retire from music or performing all together Credit: Getty Rod Stewart "One Last Time" Tour - WantaghFans have shared their concerns for rocker Rod Stewart’s health on social media Credit: Getty

This comes after earlier this year due to health setbacks.

The organisers of the event announced the shocking news yesterday – the day of the gig.

They confirmed Rod was undergoing an “unforeseen but minor medical procedure.”

The venue shared a statement on social media, which said: “Due to an unforeseen but minor medical procedure that required prompt attention, Rod Stewart’s performance tonight in Cincinnati has been postponed.

“Rescheduling is currently underway, with additional information to follow on Tuesday.

“All previously purchased tickets will be honored for the rescheduled date.”

They claimed Rod is expected to be back tearing up the stage soon.

“Rod is expected to make a quick recovery and looks forward to returning to Cincinnati,” said the Riverbend Music centre.

One fan wrote: “I hope he’s okay,” followed by a praying hands emoji.

“Praying he’s doing well the concert hasn’t been cancelled just postponed,” penned another fan.

This isn’t the first time the Scottish-born star has

Back in June was forced to pull out of a gig in California, due to a respiratory infection that later triggered a bout of laryngitis.

Just a week later, Rod and was seen using an oxygen tank onstage after nearly passing out.

Following the sad news, Rod also postponed his concerts at Red Rocks Park and Amphitheatre in Morrison, Colorado in June, citing vocal rest.

He has repeatedly told fans that while he is winding down large-scale global arena touring, he has no intention of fully retiring from music or performing altogether.

, who is married to TV personality , shot to fame in 1971 following the release of his debut album, Every Picture Tells A Story.

His biggest hits include Maggie May, Sailing and Da Ya Think I’m Sexy?

Over his six-decade career, he’s sold over 250 million records worldwide, been inducted into the Rock and Roll Hall of Fame twice, and received a knighthood in 2016.