A family source tells PEOPLE that the Grammy winner's diagnosis has "brought clarity to a series of unexplained issues" as Biel has been "incredibly supportive"

Jessica Biel shared a sweet message of support for her husband Justin Timberlake after he shared the news of his Lyme disease diagnosis.

Justin Timberlake has been diagnosed with Lyme disease, an infection caused by tick bites. See what stars like Justin Bieber and Bella Hadid have said about their experiences with the illness.