The pop singer had recently announced that he was pausing his Justice World Tour due to illness, hours before his first slated concert in Toronto.
"As you can see, this eye is not blinking, I can't smile on this side of my face, this nostril will not move," Bieber explained in a video.
"So, there's full paralysis on this side of my face. So for those who are frustrated by my cancellations of the next shows, I'm just physically, obviously, not capable of doing them. This is pretty serious, as you can see", he added.
Bieber added that he was doing facial exercises and resting "so I can do what I was born to do".
Ramsay Hunt syndrome is a late-stage complication arising from the varicella-zoster virus. It happens when an outbreak of shingles affects a facial nerve near the ears. These are the three symptoms most commonly seen in Ramsay Hunt Syndrome patients. Patients may also experience dry eyes, change in taste, extreme sensitivity to noise (hyperacusis), and even nasal obstructions.
The appearance of vesicles in your ears can be extremely painful and it can cause facial palsy in some cases.