As her fame rose in her 20s, she says she began to suffer from depression. At 28, she says she began therapy. On her 33rd birthday, she had her first serious suicide attempt. At 37, Sinéad says she finally was diagnosed as bipolar. In those years between 23 and 37 the depression had been getting steadily worse. "The volume just slowly went up and up and up," she says.
"It's almost very difficult to explain when you are the person that suffers from the thing, but the best way I can describe it is it's almost like before you get ill, you are a solid wall," Sinéad says. "And while you're ill, it's like the bricks are falling away and it's one teetering little brick."
Sinéad says her depression manifested itself in debilitating ways. "I think people experience it differently. I'm very frightened of everything," she says.