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 (NPH). This condition has been exacerbated by recent concert performances, leading to problems with hearing, vision and balance," a statement posted on his Instagram read.
Billy is currently undergoing treatment and doctors have advised that performing would have an adverse affect on his health at this time.
"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 continued.
Billy 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, which says it is most likely in people aged over 65 and "often treatable and sometimes even reversible".
Subsequently, Billy cancelled his tour, which included 17 dates in North America and England.
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 Alexa Ray.
"Someday We'll All Be Gone / But Lullabies Go On And On / They Never Die / That's How You And I Will Be," she added.
"The music continues... All My Love, Alexa Ray."
The Uptown Girl hitmaker also two children with his fourth wife Alexis Roderick.
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