JUSTIN Timberlake has opened up about living with "relentlessly debilitating" Lyme disease.

The Sexy Back singer shared the news in a candid Instagram post after facing criticism for his at-times lacklustre performance while on tour.

"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," Justin wrote.

"Among other things, 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.

"If you've experienced this disease - or know someone who has - then you're aware: living with this can be relentlessly debilitating, both mentally and physically."

Lyme disease is a bacterial infection spread to humans

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