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The 28-year-old, who has been on his Justice global tour, now claims that the recent gigs have "taken a significant toll" on him and that he needs more time to "relax and get better."
Ramsay Hunt syndrome occurs when a shingles epidemic damages the facial nerve between someone's ears, resulting in facial paralysis.
Justin had previously told supporters that he had been performing face exercises to restore mobility, but that it would take time. The Canadian shared a video in June outlining how the disease has affected him.
"It is from this virus that targets the nerve in my ear and my facial nerves, causing paralysis in my face," he explained in the three-minute video.