Jon Bon Jovi performs on stage during the 32nd Annual
Frank Micelotta / Frank Micelotta/Getty Images

Grammy-winning rocker Jon Bon Jovi is opening up about the health issue that kept him from performing for nearly four years.

During an Oct. 20 episode of the Australian broadcast A Current Affair, the 64-year-old singer revealed that his vocal cord atrophy got so severe that he struggled to get out "Happy Birthday."

Jon Bon Joni performs live in Atlanta, Georgia, on April 15, 2010. / David Bergman/www.DavidBergman.net/Hulu
Jon Bon Joni performs live in Atlanta, Georgia, on April 15, 2010. / David Bergman/www.DavidBergman.net/Hulu

Vocal cord atrophy, or presbylaryngis, is a common medical condition in people over the age of 60 in which vocal cords lose volume and inward curvature, leading to vocal fatigue, according to Johns Hopkins Medicine