Thailand's military-installed Prime Minister Surayud Chulanont will spend three days in hospital for an unscheduled medical checkup, his doctor said Monday.
Surayud, 64, was admitted to a Bangkok hospital on Monday after cancelling his appointments for the day.
His doctor insisted nothing serious was wrong with the prime minister's health, but said he would spend three days in hospital for a checkup and could return to work on April 12.
"He has high blood pressure, as well as higher fats and uric acid than normal. There is nothing serious to worry about," said Dr. Panya Taweethaikarn.
"The premier was scheduled to have a checkup last year (but didn't). The last time he did was seven years ago," he told reporters.
"This is a good opportunity, ahead of a long weekend, for the checkup. The entire process will take a couple of days, when he will stay at the hospital. He can leave to get back to work as normal on April 12," the doctor added.
Thailand begins its five-day celebration of the Buddhist New Year on Friday, a period when the country shuts down for the most important holiday on the Thai calendar.
Surayud, a former army chief, was installed after the military ousted elected premier Thaksin Shinawatra in a September coup.
Although many in Bangkok welcomed the coup, Surayud's popularity has steadily fallen.
In a new poll of 1,200 people in the Bangkok metro area, respondents rated his government at 4.5 out of 10, down from 5.27 three months earlier. Some 35 percent expressed dissatisfaction with the government's performance.
Surayud's checkup came amid reports about conflicts between him and the junta, as groups of anti-coup protesters have begun rallying in in Bangkok.
A top aide to the premier said Surayud had no intention of quitting.
"He has never thought of resigning. Despite the pressure he has to shoulder, he will continue to work until his mission is finished," Major General Ninnart Biewkhaimuk told reporters.