When fluid builds up around or inside your brain and inhibits typical functioning, it results in normal pressure hydrocephalus, or NPH, according to the Cleveland Clinic. This may lead to difficulties thinking and concentrating, as well as impair movement and memory. The condition may be reversible, and its symptoms could look a lot like dementia.

The statement added that Joel “looks forward to the day when he can once again take the stage.”

Billy Joel has canceled his upcoming concerts because of a brain disorder that has affected his hearing, vision and balance, the singer-songwriter announced on Friday.