Jack Osbourne says that he feels "fine" at the moment, but that the MS he's been diagnosed with is "a completely unpredictable disease".
He appeared on The Talk, a US talkshow, with his mum Sharon and fiancee Lisa Stelly yesterday, and said he lost the sight in one eye, which led to his diagnosis.
Jack says his sight has returned about 80%, but he's unsure if it will improve beyond that.
Today, he tweeted that it isn't as bad as it may have sounded previously:
"will you please stop sensationalizing my situation to sell ur poorly written magazines and papers.
"I AM NOT DYING!"
We're all glad to hear that.