Jimmy Fallon's Sweat-Gland Woes

“I never thought a human could sweat that much,”
the funnyman tells us.

Vision Perfected. Now I Gotta Tackle
My Persipration Problem –
No Thanks to De Niro!

Just when Jimmy Fallon got done fixing one biological imperfection, along comes another one to cramp his style.

And it's all Robert De Niro's fault.

On January 27, just 34 days before he succeeded Conan O’Brien as host of NBC’s Late Night, Jimmy underwent LASIK laser eye surgery to correct his vision. Now he reveals that he’s got to see another medical pro for what appear to be overactive sweat glands.

“I was sweating a lot my first show out. I was interviewing De Niro. I was just so nervous and excited. It was such a big night for me," he tells host Brett Cohen.

"Clearly, I have no control over my glands. So I have to go get that checked. That’s the truth,” he adds.

Jimmy later says that his profusion of perspiration led him to kick caffeine: “My producer was laughing at me. He was like, ‘I’ve never seen anyone sweat this much. This is hilarious.' “So we made the studio colder, just to help me out. It calmed my nerves down, too. I haven’t really drank coffee since that day.”

Also during the interview, Jimmy tells Brett: Why he wants to know if there’s “a Girl Scout out there who needs my help,” why he settled on a bowling roll as his signature monologue move, why he believes he’s getting better at beer pong, and whether or not (Conan be damned) he's setting his sights on Tonight Show hosting duties.