He's dealt with hiccups before, but a new injury may force Derek Hough to skip tonight's performance on "Dancing with the Stars" (October 28).

According to ABC, a severe back injury means the pro may sit Monday out as a source tells E!, "He's getting treatments now. He's not doing dress rehearsal."

If the 28-year-old doesn't dance, Henry Byalikov will instead take the hand of Amber Reilly for her performance.

Tweeting a photo of himself getting an injection in his back, Derek wrote, "This is happening ... Ouch !" In 2011, he previously hurt his back while dancing with Shawn Johnson. Stay linked to GossipCenter for news on Derek Hough's recovery.