'Dancing With the Stars' contestant Sasha Pieterse talks health scare and weight loss

The "Pretty Little Liars" actress has dropped 15 pounds because of "DWTS."

In an interview with ABC News after the show, Pieterse said that actually receiving the diagnosis was "amazing," because she had no idea why her body was changing the way it was.

"It was a difficult process for me because I didn't know how to fix it. There was nothing that I could [do to] help myself," she explained. "I just really want to bring awareness for that too because there are so many women that have that who have no idea."

Now, she said, her body is changing yet again, as she has dropped 15 pounds in just two-and-a-half weeks because of her grueling "DWTS" schedule.

"It's been amazing!" she said.