Justin Bieber says he has Ramsey Hunt syndrome. Here’s what you need to know.

Justin Bieber revealed that he suffers from a rare disease that has paralyzed one side of his face.

Earlier this week, the Canadian singer canceled a number of upcoming shows due to illness, and on Friday told fans that he was diagnosed with Ramsey Hunt syndrome.

“There’s this virus that attacks the nerve in my ear and my facial nerves and has paralyzed my face,” the 28-year-old singer said in an Instagram video.