Conservative media personality Glenn Beck announced Monday that he's been battling a mysterious neurological illness that not even top-flight doctors can diagnose.

According to TVNewser, Beck told viewers of TheBlaze today that doctors gave him another five to 10 years before he'd lose normal functions. His illness has involved seizures and bursts of excruciating pain, he said.

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“My hands, feet, arms and legs feel like someone had just crushed them, or pushed broken glass into my feet,” Beck said. “The doctors tell me I haven’t had REM sleep in as much as a decade.”

“While I was at Fox the pain would get so bad that the crew worked out hand signals so they would know when to take the camera off of me," Beck added. “We even looked into whether someone was poisoning me. We moved to a warmer climate. Yes, this is one of the reasons we moved to Dallas.”

According to Beck, his doctors believe he "wouldn't be alive today" had he not moved away from New York City. He said his condition improved this summer, thanks in large part to hormone therapy.

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“My brain is back on line in a big way,” Beck said.

The broadcaster, one of the most visible faces of Fox News early in the Obama presidency, left the network in 2011. That same year, Beck founded a subscription-based service called GBTV, now TheBlaze TV.