A post that has since been deleted from the 47-year-old Poison frontman's website said he was planning to resume his Roses and Thorns tour with a sold-out May 26 show in Fort Smith, Ark., that had been postponed from earlier this month when Michaels underwent an emergency appendectomy.
Michaels, a contestant on "The Celebrity Apprentice," suffered a subarachnoid hemorrhage, which causes bleeding in the fluid-filled spaces around the base of the brain. He was rushed to the hospital on Friday with a severe headache.
"Doctors state Michaels is very lucky as his condition could have been fatal," according to a statement posted Tuesday on his website, which was also provided by Michaels' New York-based publicist Joann Mignano.
"With further testing and rehabilitation, they are hopeful that Bret will gradually improve as the blood surrounding the brain dissolves and is reabsorbed into his system, which can be a very painful recovery and take several weeks to months," the statement said.
Michaels has developed a side effect that causes seizures, according to the Tuesday statement. The condition, called hyponatremia, stems from a lack of sodium. The statement did not indicate if Michaels had actually suffered any seizures.
Michaels was diagnosed with Type 1 diabetes at age 6. He had an emergency appendectomy April 12 after complaining of stomach pains before he was scheduled to perform in San Antonio.
A statement posted on his website after the surgery said it had "taken its toll," but doctors expected him to make a full recovery.
On Donald Trump's competitive reality show, "The Celebrity Apprentice," the glam-rock artists and father of two has served as one of the season's most outspoken celebrities and has so far avoided being fired in the boardroom.
Before joining the show, Michaels starred in VH1's lusty reality dating series "Rock of Love" for three seasons.