Former First Lady Barbara Bush was hospitalized Saturday morning after "not feeling well," according to a family spokeswoman.
At the request of her doctor, Bush, 84, was admitted to Methodist Hospital in Houston at 10 a.m. to undergo routine tests.
Her husband, President George H.W. Bush, accompanied her to the hospital.
"He's concerned, but has great faith in the doctors," said Jean Becker, the chief of staff for the office of the former president.
She is expected to be released within a day or two.
Although Bush hasn't been feeling "like herself," she's been keeping up her public schedule. A champion of literacy as first lady, Bush read to children Friday at Houston's Barbara Bush Elementary School.