Los Angeles, April 15 -- Rapper Lil Nas X has revealed that he's suffering from a mysterious case of partial facial paralysis.

On Monday, he took to Instagram and shared a series of videos from the hospital and opened up about his health, as per CNN.

In one video, Lil Nas X attempts to smile from his hospital bed but only one half of his face complies while the other stays still. In the video caption, the 26-year-old said he'd "lost control of the right side of my face."

"This is me doing a full smile right now by the way," he said jokingly in the video. "It's like, what the f**k? I can't even laugh right bro."

Lil Nas X posted another video to his Instagram Stories, zooming in on one side of his face and saying, "we normal over here"...