The singer-songwriter is apparently being treated outside of Chicago at Timberline Knolls, where Demi Lovato to had sought help, reported People.
"I'm a crusader for being yourself and loving yourself but I've found it hard to practice," the 26-year-old singer said in a statement.
"I'll be unavailable for the next 30 days, seeking treatment for my eating disorder... To learn to love myself again. Exactly as I am."
Kesha was recently in India for a charity concert.