Billy Joel was diagnosed in May 2025 with a brain condition called normal pressure hydrocephalus (NPH). This condition involves a buildup of cerebrospinal fluid in the brain ventricles, which can disrupt brain functions such as memory, movement, and concentration. His symptoms include issues with hearing, vision, and balance—he described his balance as "terrible" and feeling "like being on a boat." The condition worsened after his recent concert performances, leading to him canceling all scheduled shows through July 2026 to focus on treatment and recovery. NPH is often treatable, sometimes reversible with surgery that implants valves to drain the excess fluid. Billy Joel is undergoing physical therapy and has been advised to refrain from performing while recovering. Though the condition is serious, he has reassured fans that he feels good overall and that the label "brain disorder" sounds worse than how he feels. The cause of his condition is unknown. He remains committed to his recovery and hopes to perform again in the future but is prioritizing his health for now.