Joel shared the news on Bill Maher's "Club Random" podcast, saying that while his condition "hasn't gotten better" and "is still being worked on," he feels "fine" overall, according to CNN.

"My balance is terrible. It's like I'm on a boat," Joel said, later adding:

"I feel fine. I think they continue to call my condition a 'brain disease,' which sounds much worse than how I feel."

Hydrocephalus is a "very rare condition" that "occurs when a person has too much fluid in the brain," according to Yale Medicine.

Less than 3% of adults over the age of 65 are diagnosed with NPH, and the condition affects men and women equally.

Joel announced in May that his concerts had been canceled so he could seek treatment for NPH, saying that his condition "has worsened since recent concerts, resulting in hearing, vision, and balance issues."

"On the advice of his doctor, Billy is undergoing specific physical therapy and has been advised to refrain from performing during his recovery period. Billy is grateful for the excellent care he is receiving and is fully committed to putting his health first," his team said in a statement.

Joel's announcement in May came after he previously postponed eight tour dates to focus on his recovery from recent surgery.

Last week, HBO Max debuted a new documentary about Joel's early years and career.

Titled "Billy Joel: And So It Goes," the film traces Joel's beginnings and early musical partnerships, while also delving into some of his personal struggles. | BGNES