The musician revealed he was diagnosed with a form of the illness – Parkin’s II – in January that affects the nerves in his body.
Speaking at iHeartRadio ICONS in California, Osbourne explained his health struggles have made recent months very difficult.
“This last year, I’ve been in a bad state, health-wise,” he said.
“It all caught up with me. Staph infection in my hand, then I had pneumonia, then I fell over, then I had surgery.”
Osbourne was referencing a life-threatening fall in his bathroom in 2019.
The Black Sabbath star went on to say that he has known about his illness for 17 years.
“Everyone thinks I’ve just discovered the Parkinson’s. I’ve known about the Parkinson’s since 2003,” he said.
“It’s just been f***ing hell... I paid for all the years that got away from me.”
The musician was asked whether or not he planned to retire soon due to his health issues.
“I’ve thought about it. I sometimes think crazy thoughts like that. I cannot retire. I love you guys,” he said in reference to his fanbase.
Osbourne first spoke about his diagnosis on Good Morning America earlier this year.
“To hide something is hard – you never feel proper,” he said.
“You feel guilty. I’m no good with secrets. I cannot walk around with it anymore. It’s like I’m running out of excuses. I feel better now that I have owned up to the fact that I have a case of Parkinson’s.”