"We support Demi's decision to put her health first and we send her our best wishes," a Disney spokesperson tells PEOPLE.
Lovato's Disney show, Sonny with a Chance, continues to be on a scheduled hiatus.
The star has been dealing with "emotional and physical issues … for some time," her rep confirmed to PEOPLE, adding, "Demi has decided to take personal responsibility for her actions and seek help."
A source close to Lovato's family told PEOPLE, "She was bullied in school. She fought through eating disorders and has struggled with cutting. … Demi is taking control by getting help."