US singer-songwriter and pianist Billy Joel says he is cancelling all his scheduled concerts after he was recently diagnosed with a brain disorder.

The 76-year-old singer revealed he was suffering from normal pressure hydrocephalus, which is a condition that happens when cerebrospinal fluid builds up inside the skull, pressing on the brain.

Joel described problems with his hearing, vision and balance, which were exacerbated by recent concert performances.

His diagnosis comes months after he stumbled and fell during a concert at Mohegan Sun in Connecticut in February.

More likely in people aged over 65, symptoms of normal pressure hydrocephalus resemble those of dementia.

People may notice symptoms like trouble walking, poor balance, falling, forgetfulness and confusion, mood changes, depression and loss of bladder control.

The condition is treatable with surgery to drain the fluid and can be reversible, according to the Cleveland Clinic.

Joel said he was undergoing physical therapy and has been advised to refrain from performing while he recovers, according to a statement on social media.

“I’m sincerely sorry to disappoint our audience, and thank you for understanding,” Joel said.

The tour, which had stops in the United States, Canada and the United Kingdom, had been due to start in February, but that was rescheduled to July due to an undisclosed medical condition.

Joel, known for hits like Piano Man and Uptown Girl, ended his record-breaking monthly Madison Square Garden residency — which had begun in 2014 — last year.

-with AAP