India, Aug. 2 -- Justin Timberlake has been diagnosed with Lyme disease, the former NSYNC star said on Instagram. He shared the news on Thursday in a lengthy social media post, ommemorating his Forget Tomorrow tour, which wrapped in Turkey on Wednesday, adding that the disease "can be relentlessly debilitating, both mentally and physically". "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," the 44-year-old wrote. He added, "When I first got the diagnosis, I was shocked. But, at least I could understand why I would be on stage 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." The singer, who described himself as a private person, wrote he considered ending the tour when diagnosed, but wrote that he "decided the joy that performing brings me far outweighs the fleeting stress my body was feeling. I'm so glad I kept going". Lyme disease is transmitted by Ixodes ticks and can cause neurological problems, flu-like conditions, joint paint and other symptoms. In most cases, Lyme disease is successfully treated with antibiotics. HTC...