He's struggling with a mystery illness.

Bill O’Reilly announced this week that he is temporarily stepping back from media appearances due to an unspecified illness. The former Fox News anchor – who hosted “The O’Reilly Factor” for more than ...

Bill O'Reilly will be taking a break from his various media endeavors to deal with an undisclosed illness, the "No Spin News" ...

Former Fox News host Bill O'Reilly said he spent four days hospitalized due to a "hereditary condition involving internal ...