Giuliani Talks About His "Very, Very Bad Headache"

From CBS News' Ryan Corsaro:

HOPKINTON, N.H. -- Rudy Giuliani described having a "very, very bad headache" as the reason for his overnight hospital stay earlier this week in St. Louis.

"I got a very bad headache and they checked me out fully and completely, and as you can see I'm in great health – Thank God. I went through a lot of tests. Every one of them came out perfectly normal, and I'm in great shape."

Giuliani had checked into Barnes-Jewish Hospital Wednesday night after turning his New York bound plane around and landing back in Chesterfield, Missouri. He was admitted for tests and released the following afternoon.

"It got worse when I got on the airplane because of the pressure I think in the cabin", Giuliani explained to reporters after a town hall meeting in Hopkinton, New Hampshire.

Later, he was asked if he thought he might be having a heart attack. "No I did not," he said. "I knew it was a very bad headache. I knew exactly what it was."

He said the reason for his ailment was because of being "tired, not sleeping, who knows exactly why."

When asked why his campaign had described his condition as having flu-like symptoms, the Giuliani responded by saying, "You're gonna have to ask them…what exactly the description was, I'm telling you what happened, was that I had a very, very bad headache. I then got checked out. Went through a lot of tests, and all the tests came out 100% normal which is the bottom line."

He also mentioned his being careful because of his history with prostate cancer, for which he says he is tested regularly.