Justin Timberlake 'pushed through for months before finally getting answers' with his Lyme disease diagnosis, and his wife, Jessica Biel, has been 'incredibly supportive' through it all, a family source tells PEOPLE.

LOS ANGELES — Justin Timberlake has been diagnosed with Lyme disease, the former NSYNC star said on Instagram Thursday. Timberlake shared the news in a post commemorating his Forget Tomorrow tour, which wrapped in Turkey on Wednesday, adding that the disease “can be relentlessly debilitating, both mentally and physically.”