Bret Michaels is back in hospital after suffering what doctors call a ‘warning stroke’.

The US rocker and reality TV star has also been diagnosed with a hole in the heart, it was reported on his website.

The star’s publicist confirmed the report.

Bret was hospitalised after experiencing numbness on the left side of his body, particularly in his face and hands. Doctors said the condition is operable and treatable and likely to be unrelated to the brain haemorrhage the 47-year-old suffered last month.

Bret’s neurosurgeon said that while the Poison frontman has a ‘fantastic attitude’ about making a full recovery, his ‘brain and body are not quite 100 per cent yet, especially with the hole found in his heart’.

Additional tests were being conducted to determine the best course of treatment. Doctors said the star is currently being treated with a daily injection of a blood thinner to reduce the risk of clots.

His website said Bret was ‘up, walking, talking, continuing his daily rehab and very happy to be alive… He has made it clear he is sick and tired of being in the hospital and is ready to rock again,” the site said.

Bret was expected to appear at Sunday’s finale of Donald Trump’s The Celebrity Apprentice in New York. NBC said in a statement that the network is ‘cautiously optimistic'” that he can attend the live season finale. “Ultimately, it’s up to Bret and his doctors if he should attend,” the statement said.

In the episode, Trump’s boardroom revelation of the winner will screen live. The rest of the show was taped last year.