As pop star Justin Timberlake shares his diagnosis of Lyme disease, his ordeal brings up questions. What is Lyme disease and its cause? How is the illness treated? A doctor explains.

The singer said living with Lyme disease “can be relentlessly debilitating, both mentally and physically.” Here’s what to know about the condition caused by ticks.

FRIDAY, Aug. 1, 2025 (HealthDay News) — Singer Justin Timberlake has Lyme disease, a condition he says caused nerve pain, fatigue and other symptoms during his recent tour. In a post on Instagram Thursday, the 44-year-old pop star said the tick-borne illness left him feeling “relentlessly debilitated, both mentally and physically.”