"It is nothing," he says, and means it- doing this for her is such a small bit of mindness, and ought to set her to rights. He leaves only to peek outside the tent and make his request to someone passing by. Luckily, another elf comes, and with bribery and Thranduil's charm, it's not half an hour before he and the other fellow are hauling a tin washbasin halfway filled with steaming water, and then another set of sheets. Thranduil dismisses him, and then strips off his outer robe, rolling his tunic up to his elbows and taking a small cake of soap out from the sheets.

"Come here," Thranduil requests, stepping back up to the bed and offering her his arm. She's ill, and needs help bathing- he thinks no more of her eminent nudity than that of any other elf who he'd need care for.