Imagine Dragons' Dan Reynolds Raises Awareness of Auto-Immune Disorder & Announces Fourth Baby

Now, Reynolds -- who recently reconciled with wife Aja Volkman and announced the couple is expecting their fourth child -- is using his public platform to educate the public about what he terms the “hidden” disease. The cheekily titled campaign, called Monster Pain in the AS, is designed to help participants determine whether they may be suffering from AS through a short, three-minute quiz, as well as provide tips and resources for managing the disease.

“It’s frustrating,” he said. “You feel like, ‘What’s wrong with me, and why am I different than everyone else?' And that’s [what] this campaign is -- to raise awareness. People start to say, 'Ok, we know what this is, we’ve heard about it, maybe that’s something that I have.’ The goal is to mainstream AS.”