Workaholic George Clooney is raising fears he's putting his health in jeopardy with his relentless schedule after skipping several events at the Venice Film Festival due to illness, RadarOnline.com can reveal.

The sinus infection that forced the burned-out 64-year-old actor from promoting his upcoming Netflix movie, Jay Kelly , is a sign of a much more serious problem than a mere case of the sniffles, a source said. Article continues below advertisement

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"George has so much going on he rarely gets a night off," the insider said. "That schedule might have been doable at 45, but he's not a young man anymore.

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