Her Majesty Queen Sirikit is undergoing a general physical check-up at Chulalongkorn Hospital until tomorrow, according to the Royal Household Bureau.
Her Majesty arrived at the hospital yesterday, said an announcement released by the bureau.
Queen Sirikit was last admitted to Chulalongkorn Hospital in August with influenza. By late August, she had made a full recovery and was well enough to return to Chitralada Palace.
On Aug 30, the bureau announced that the flu had subsided and Her Majesty's health had returned to normal. The Queen no longer had a fever and her cough had eased. An X-ray of Her Majesty's lungs proved satisfactory and a blood test showed her in good health, according to the bureau.