Justin Timberlake has been diagnosed with Lyme disease. The singer, 44, told fans about his “debilitating” health struggle in a statement posted on Instagram Thursday. “Well, as these two incredible years come to an end and I look forward to the future,

Timberlake didn’t disclose what stage of Lyme disease he has, but, according to the Mayo Clinic, various stages can include symptoms of tiredness, pain, joint swelling and muscle weakness. Timberlake wrote that he was “reluctant” to share the personal news, but he wanted to be “transparent” about his struggles “so that they aren’t misinterpreted.”