LeAnn Rimes has battled jaw problems for years, and unfortunately for fans at a recent show at Oklahoma's Choctaw Casino, that meant their show ended earlier than normal.

The songstress has been diagnosed with Temporomandibular Joint Syndrome, also known as TMJ, which is described as pain and dysfunction of the muscles that move the jaw, as well as the adjacent temporomandibular joints.

Rimes underwent surgery in 2012 to correct the disorder. “I’ve been in SO much pain it’s not even funny. Nothing major just annoying! Pain pain go away!!!!!!” she said about her surgery. “When it’s mouth pain and jaw pain it makes your whole head pound! YUCK.”

The songstress has been battling issues related to her mouth for a long time.

"I’ve been living in a dental nightmare for 10 months," she revealed in 2012. "I’m getting back on track though, I hope.”

Rimes sued her dentist last year, saying that her "ability to perform as an artist has been and will continue to be significantly compromised until all re-treatment is complete.”

The wife of actor Eddie Cibrian has had other health issues to deal with this year as well. She was hospitalized earlier this month for severe stomach pains.

Rimes' next scheduled performance is on April 4 in Biloxi, Miss. See a list of all of her upcoming shows here.

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