updated 04/12/2012 AT 11:00 AM ET
•originally published 04/11/2012 AT 3:45 PM ET
The actress, 47, alarmed viewers when she was absent from Tuesday night’s elimination episode, but Chmerkovskiy, 32, says she’s just taking it easy at home.
“She’s in pain,” he told PEOPLE backstage after the show. “She’s got a big headache. The doctors said she has a minor concussion, and I know that’s really unpleasant.”