Unable to doze off at the SevenHills Hospital, Big B took to Twitter at 4 a.m. Saturday to connect with his "extended family".
"Have not been able to sleep yet… so I guess you all have to tolerate me for a while," the 69-year-old megastar wrote.
"The body repairs but gradually… what a piece of machinery the Almighty created…incredible!
"Yes it’s become a routine now to be awake all night almost… best time to think, reminisce, write and contemplate…
"The doctors have gone home, the family is asleep in adjoining room and the night nurses and sisters are a joy to be with…," he added.
Amitabh complained that the internet connection at the hospital conked out for a while.
At night, he listened to Coke Studio.
"Such talent within and across the border … soulful, caressing, almost taking the pain away…"
Big B earlier spoke of his slow recovery.
"There seems to be a slight, very slight, upward push to the graph on recovery, though there is still an immense amount of work to be done," he posted on his blog bigb.bigadda.com Friday night.
Amitabh was admitted for abdominal surgery Feb 11. He was to be discharged Feb 13. But acute pain forced doctors to keep him under observation.
Doctors were thinking of another surgery Friday but that did not take place as he showed slight improvement.
"The fever stayed within control and a few blood readings brought a gentle smile on the faces of the medical team," he said.
"A CT Scan planned to detect another nagging problem … shall be considered tomorrow.
"My intake has been improved upon – from three sips of water per day to four sips! Thats like a couple of teaspoons full extra," added the actor.