The 71-year-old tweeted: "Yes...went to work! Back for quite a while...and the fever has returned!! DAMN."

He took a day off on Wednesday and tweeted: "The time it takes for one to adjust to a day of rest, is akin to time taken for an entire lifetime...or so it feels."

A source from the set of KBC said Bachchan couldn't come for the shoot on Thursday and that he must take rest.

So now, the KBC team is likely to reschedule his shoot to next week, the source added.

At his age, Big B is one of the most active Hindi film veterans and he keeps himself occupied with TV and film projects.

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