After experiencing tremendous pain in both legs, the young dancer was diagnosed with a rare pain disorder called RND (Reflex neurovascular dystrophy). Fortunately, Nia overcame it with months of grueling physical therapy and exhaustive coping sessions.

What condition does NIA have?

It's a triumphant return to the Children's Institute for 12-year-old Nia Frazier. Four years ago, she was diagnosed with reflex neurovascular dystrophy, a condition in which pain symptoms are greatly magnified.

Does Nia ever get nationals solo?

Viewers will remember that Abby told Nia Frazier she was not guaranteed a solo in episode 30, despite winning against her competitor Kalani Hilliker. In spite of her threats, it appears Nia, then 13, was granted a solo. ... In the past four season of “Dance Moms,” Nia has never been given a solo at nationals.