45-year-old Kejriwal, who had spent a cold night in the open during his protest outside Rail Bhavan, underwent a number of tests, including a CT scan at the Yashoda Hospital where he stayed for around 45 minutes.
"I have strictly advised him to take two-day's bed rest so that condition of his throat improves," Kejriwal's family doctor Bipin Mittal, who has been looking after him since 1995, said.
Dr Sunil, who treated Kejriwal at the hospital, said the Chief Minister had complained of persistent cough.
"We have conducted several tests, including CT scan on him. We have asked him to take rest today," said Dr Sunil, adding that reports of some tests would come tomorrow.
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Mittal said Kejriwal's "cough increased" due to his two-day protest where he had to speak a lot, besides spending Monday night under open sky outside Rail Bhavan.
When asked about the treatment, Kejriwal said, "I came here to get my continuous cough treated.CT scan has also been conducted."
The Delhi Chief Minister's dharna in the heart of the national capital came to an end last night after two police officers were sent on leave under a neat compromise with the Centre over his demand for suspension of five officials for alleged dereliction of duty.