Singer Justin Bieber has revealed he can't blink.

or smile on the right side of his face as he is suffering from a rare neurological disorder.

In an Instagram video, the 28-year-old told fans he was canceling shows.

Bieber demonstrated he couldn't blink his right eye.

a smile on the right side of his face, or move his right nostril.

He has also said it has been getting "progressively harder" for him to eat.

I have hope and I trust God and I trust that this is all for a reason.

I'm not sure what that is right now but in the meantime,

I'm going to rest and I love you guys."