Celine Dion‘s sister, Claudette Dion, says her sister is still battling the exhaustive pain caused by Stiff-Person Syndrome — the neurological disorder that has halted all of Celine’s live performances for the past year.

“It’s an illness we know so little about,” Claudette said in a recent interview with Hello! Canada, telling the publication that her sister’s spasms “are impossible to control.”

“There’s little we can do to support her, to alleviate her pain,” she continued.

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