Pop icon Justin Timberlake revealed he has Lyme disease, joining a growing list of celebrities who have gone public with their diagnoses.

Lyme disease is caused by bacteria spread through the bite of infected ticks. Symptoms include rash, fever, headache, extreme fatigue, stiffness in joints, muscle aches or weakness, according to the Mayo Clinic.

As revealed in a vulnerable Instagram post just one day after his final show, the pop superstar had long been suffering from nerve pain and severe fatigue caused by Lyme that made him question whether he should stop touring.