Musician Bret Michaels suffered a "minor setback" when doctors discovered a side effect from the brain hemorrhage the rocker suffered that could lead to seizures, his reps said Tuesday.
Michaels, who remains in critical condition in intensive care, was found to have a side effect called hyponatremia, a sodium deficiency in the body that could cause Michaels to suffer seizures, his reps wrote on Michaels' Facebook page Tuesday.
His reps called the finding a "minor setback" but said they and doctors remained hopeful the singer could make a "full recovery."
The "Celebrity Apprentice" and "Rock of Love" star remains under 24-hour observation in the ICU.
Michaels' reps also revealed on the Facebook posting that the singer's test results "demonstrated findings of a subarachnoid hemorrhage," which presents itself "suddenly as the sound of a loud gunshot or thunderclap at the back of the head causing severe cranial pain and muscle spasms."
The singer's camp acknowledged that many speculated the hemorrhage could be a result of an injury suffered when a prop struck Michaels at the Tony Awards in June, but did not confirm or deny those rumors.
The father of the reality TV star said earlier Tuesday that Michaels is speaking and moving his limbs but remains "a little slow."
"He sounded a little slow, but fine," dad Wally Sychak told Extra TV outside his Pennsylvania home after speaking with his son on the phone.
"He was talking, not as cheerful as he usually is. But I guess he is under sedation. But he understood what he was saying and knew me. Everything seemed good that way."
"They say he's moving his arms and hands. The best as they could expect at this time," his dad told Extra.
Michaels was rushed to an undisclosed hospital last Thursday night after complaining of an intensely painful headache. Doctors discovered that Michaels had suffered a massive subarachnoid hemorrhage (bleeding at the base of his brain stem).
According to a source who spoke to People, Michaels complained that the headache felt "like [getting] hit in the head with a baseball bat over and over again."
A statement on Michael's website thanked fans for their concern and expressed optimism about the "Rock of Love" star's recovery.
"As we all know Bret is a fighter and we are hopeful that once all is complete the slurred speech, blurred vision and dizziness, etc. will be eliminated and all functions will return to normal," the statement said. "Everyone at Michaels Entertainment would like to thank all fans and friends for their continued thoughts and prayers through this difficult time."
Earlier this month, Michaels had to cancel tour dates after undergoing appendectomy surgery on April 12 in Texas. It is unclear if that procedure -- or his diabetes -- had anything to do with the hemorrhage.
Michaels has also been competing on the current season of "Celebrity Apprentice." Donald Trump, who hosts the show, told TMZ Monday that Michaels is in "big, big trouble and the prognosis is not great."
"He turns out to be an amazing competitor and ultimately that is the thing that could save his life," Trump said.