Billy Joel's Brave Decision After Surprising Brain Surgery Reveal

Billy Joel is opening up about navigating a recent diagnosis.

“I noticed that my balance was not good. I had this sense of being on a boat, like this rocking motion,” Joel, 77, explained on Wednesday, September 9, during SiriusXM’s The Billy Joel Channel. “I wasn't steady on my feet. I didn't know why that was and I went to meet with the neurologist, and I was diagnosed with having something called normal pressure hydrocephalus, which they used to call water on the brain.”

Normal pressure hydrocephalus is a condition that occurs when cerebrospinal fluid builds up inside your skull and puts pressure on the brain, according to the Cleveland Clinic. The condition typically occurs in people over the age of 65 and is often treatable, sometimes reversible.