Bret Michaels has thanked fans for their support after he was rushed to hospital during the week

He wrote on Instagram: "To the incredible fans in Nashville, thank you for all your well wishes!! I was truly fired up to get on stage in the Music City and perform, but due to an unforeseen medical complication & following hospitalization, it was not possible. I send my deepest apologies for being unable to rock the stage tonight!!!"

He later wrote on his website: "There are not enough words of thanks & gratitude for the well wishes from family, friends & fans. Can't thank enough Nashville's incredible & determined medical staff who helped me as you can see with several IV sites to run tests & administer fluids.

I'm determined to try to rock Jacksonville & return for a Nashville show someday soon."

Bret - who has type 1 diabetes - did not disclose his condition but sources told TMZ the star may have had a bad reaction to medication related to COVID-19 as a result of his diabetes.

Two years ago, the 'Every Rose Has Its Thorn' singer revealed he had been diagnosed with skin cancer and also needed surgery on his shoulder.

In a post on his website, he wrote: "After a very recent kickoff to the

new year, physical MRI it has been brought to my attention that I have

torn my right shoulder rotator cuff which would answer the question why it looks like a lump or bone was sticking out of my right shoulder.

"A little more complex I will also have to undergo a procedure to remove skin cancer that was detected after a recent biopsy."