Alex Trebek is the consummate trouper.

In a revealing interview, the longtime “Jeopardy!” host discussed working through agonizing cancer pain while trying to make it through taping sessions.

“This got really bad. I was on the floor writhing in pain. It went from a 3 to an 11. And I just couldn’t believe, I didn’t know what was happening,” he told CBS’ “Sunday Morning” host Jane Pauley. “And it happened three or four times a day while we were taping. So, that was a little rough on me.”

The 78-year-old Trebek publicly revealed his stage-four pancreatic cancer diagnosis on March 6, but earlier, he mentioned that what he described as stomach pain was actually an abdomen lump “the size of a small fist.”