Billy Joel’s daughter Alexa Ray Joel says her father “continues to regain his strength” while battling a brain disorder.

The 76-year-old musician has revealed being diagnosed with a condition called normal pressure hydrocephalus, which has caused problems with his hearing, vision and balance.

“Billy Joel has announced that he will be cancelling all scheduled concerts following a recent diagnosis of Normal Pressure Hydrocephalus . This condition has been exacerbated by recent concert performances, leading to problems with hearing, vision and balance,” a statement posted on his Instagram read.

Joel’s diagnosis, revealed at the weekend, came months after he stumbled and fell during a concert at Mohegan Sun in Connecticut in February.

Doctors have told him that performing during his treatment would would have an adverse affect on his health.

“Under his doctor’s instructions, Billy is undergoing physical therapy and has been advised to refrain from performing during this recovery period. Billy is thankful for the excellent care he is receiving and is fully committed to prioritising his health. He is grateful for the support from fans during this time and looks forward to the day when he can once again take the stage,” the statement said.

Joel added his own message to fans, saying: “I’m sincerely sorry to disappoint our audience, and thank you for understanding.”

Normal pressure hydrocephalus happens when cerebrospinal fluid accumulates in the skull and presses on the brain, according to clevelandclinic.org. It says it is most likely in people aged over 65 and “often treatable and sometimes even reversible”.

Joel subsequently cancelled his tour, which included 17 dates in North America and England. The tour was initially scheduled to start in February but had already been delayed until July, due to an undisclosed medical condition.

Alexa Ray, whose mother is model Christie Brinkley, has since provided an update on her father’s progress.

She captioned a painting of a father and daughter on Instagram: “SOUND UP. We love you and we got you, Pop!”

“I just wanted to thank you all for the beautiful outpouring of love and support amid the recent news of My Father’s health diagnosis,” Alexa Ray continued.

“My Dad is the strongest and most resilient man I’ve ever known … and he’s entirely committed to making a full recovery with ongoing physical-therapy treatments as he continues to regain his strength.

“The genuine care, empathy, and concern from everyone means so much to him … it means a lot to me, too.”

She concluded her post by sharing the lyrics to Billy’s 1993 track Lullabye (Goodnight, My Angel), which he penned for her.

“Someday We’ll All Be Gone / But Lullabies Go On And On / They Never Die / That’s How You And I Will Be,” she wrote.

“The music continues… All My Love, Alexa Ray.”

Brinkley, who was married to Joel from 1985 to 1994, also posted her own good wishes for her former husband.

“The whole Brinkley gang is sending you lots of love and good wishes for a full and speedy recovery,” she wrote on a post accompanying footage of a Joel concert.

“We all want you back in that white hot spotlight; you’re OUR piano man; And we’re always in the mood for your melodies; And we all hope you’re feeling allright!

“We Love You, the kids, me and a whole bunch of full arenas!”

The Uptown Girl hitmaker also two children with his fourth wife Alexis Roderick.

-with AAP