Ace Frehley, the founding lead guitarist of the iconic rock band KISS, died at age 74 due to complications from a brain bleed caused by a fall. In late September 2025, Frehley slipped and hit his head in his home recording studio, which led to a severe intracranial hemorrhage (brain bleed). This medical emergency forced him to cancel planned tours, and he was placed on life support due to the severity of his condition. Despite treatment, his health rapidly declined, and his family made the difficult decision to disconnect him from life support, leading to his peaceful passing on October 16, 2025, in Morristown, New Jersey. His family described the loss as monumental and expressed great sorrow, celebrating his achievements and legacy as a rock legend.

Thus, Ace Frehley's death was due to a brain hemorrhage resulting from a fall in his home studio, followed by complications that ultimately led to his passing.