Celine Dion's sister shares troubling update on the singer's health

Celine Dion is struggling with her health, following her diagnosis of stiff person syndrome.

Her sister Suzette revealed that the condition which forced the singer to cancel her world tour is proving very difficulty to treat.

"We can't find any medicine that works, but having hope is important," she told French-Canadian publication Le Journal de Montreal

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The 55-year-old Power of Love singer was diagnosed with the rare condition last year. Symptoms include extreme muscle stiffness, rigidity and painful body spasms.

"Unfortunately, these spasms affect every aspect of my daily life, sometimes causing difficulties when I walk and not allowing me to use my vocal cords to sing the way I'm used to," the singer revealed in an Instagram video.

Claudette said the important thing is that Dion is able to rest, which is why she cancelled her world tour.

"She always goes above and beyond [when performing], she always tries to be the best and top of her game," the star's sister said.

"At one point, your heart and your body are trying to tell you something. It's important to listen to it."

They haven't given up hope yet, though. Claudette says the Canadian singer is speaking to top medical researchers in the field, and is determined to return to the stage before too long.

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"[Performing] is innate to her, she's disciplined in every area of her life," Claudette added.

After announcements that her tour would be postponed, Dion ultimately had to cancel all her concert dates in May of this year.

"It is with tremendous disappointment that we have to announce today the cancellation of the Courage World Tour," she wrote at the time.

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"I'm so sorry to disappoint all of you once again. I'm working really hard to build back my strength, but touring can be very difficult even when you're 100 per cent."

"I want you all to know, I'm not giving up… and I can't wait to see you again," she added.

Dion was set to take to the stage in Amsterdam in August to kick off the European tour, before finishing up in London in April 2024.