The 20-year-old professional dancer, who's partnered with "Hannah Montana" actor Cody Linley on the popular ABC dancing competition, went to Cedars-Sinai Medical Center following the live results show Tuesday.
Hough said she hadn't been feeling well all day and "curled up in a ball" backstage after the show.
"I'd never been in an emergency room before," she wrote. "I was grateful I wasn't there for anything more serious than a bad stomach ache."
