Speaking to Oprah Winfrey on her chatshow, the rocker revealed that he has also been suffering from headaches ever since being released from hospital earlier this month. It was his first televised interview since leaving hospital.
The Celebrity Apprentice contestant added that he is doing two rehab sessions a day in order to expedite his recovery.
"Each day it gets better," he said.
Michaels plans to go back on tour on May 28.
