“The doctor said, ‘You have signs of Alzheimer’s,’” Womack, 68, told Britain’s BBC Radio 6 music station. “He said it’s not bad yet but it’s going to get worse.”
He added: “How can I not remember songs that I wrote? That’s frustrating.”
The 2009 Rock and Roll Hall of Fame inductee, whose hits include “Woman’s Gotta Have It” and “If You Think You’re Lonely Now,” suffered a number of health problems in the past year.
In March it was disclosed that he was diagnosed with colon cancer, which was later successfully treated, and he also underwent what was termed a “minor heart procedure.”
Other recent health issues included prostate cancer, pneumonia and collapsed lungs.