Can you imagine performing your heart out on stage, only to discover you’re battling a ‘relentlessly debilitating’ disease? That's exactly what Justin Timberlake revealed to the world just after wrapping up his Forget Tomorrow World Tour.

The 44-year-old pop icon took to social media on Thursday to share the shocking news of his Lyme disease diagnosis. In a heartfelt Instagram post, he opened up to his fans, saying, “As I’m reflecting on the tour and festival tour — I want to tell you a little bit about what’s going on with me.”

He bravely acknowledged that he had been facing some serious health issues, stating, “I’ve been battling some health issues, and was diagnosed with Lyme disease — which I don’t say so you feel bad for me — but to shed some light on what I’ve been up against behind the scenes.”

For those unfamiliar with Lyme disease, it’s an infection transmitted through tick bites and can lead to debilitating symptoms like fatigue and severe pain. Timberlake described it as a condition that can be “relentlessly debilitating, both mentally and physically.” It’s a reality many fans may not have considered while cheering him on during his performances.

Justin admitted his initial shock upon receiving the diagnosis. “When I first got the diagnosis I was shocked for sure. But, at least I could understand why I would be onstage and in a massive amount of nerve pain or just feeling crazy fatigue or sickness. I was faced with a personal decision: Stop touring? Or keep going and figure it out?”

Choosing the latter, Timberlake decided to continue performing, stating, “the joy that performing brings me far outweighs the fleeting stress my body was feeling.” And you know what? He’s glad he made that choice. “It helped me prove my mental tenacity while also bringing much more happy memories to me and those in attendance, something I will never forget.”

In his lengthy message, he expressed a desire to be more transparent about his struggles, ensuring that they aren’t misinterpreted. He also announced plans to support others battling Lyme disease. Justin sent out a heartfelt thank you to everyone who made his tour dreams come true, adding, “There really is no way to put into words the feeling of being on a stage and getting to share the experience of live music with all of you.”

He described this experience as “a vibration of frequency that is unmatched. Sacred to me.” As he reflected on his future on stage, he promised to cherish every moment of this run and all previous ones, calling it “the stuff of LEGEND for me.”

Signing off, he shared a touching message for his wife and kids, saying, “You are my heart and my home. I’m on my way.”

Fans flooded the comments with love and support. One user expressed gratitude, saying, “Thank you for being open and thank you for pushing through to continue performing! I saw you 3x this tour and each time was phenomenal! I wish I could’ve seen more shows! We all love you and thank you for giving us all you do!” Another chimed in with, “rest up homie,” while a third user offered, “A lifetime of healing vibes and energy to you as you battle this. Thank you for your hard work and dedication to us, the fans.”