Fresh from putting up 50 points in the Philadelphia 76ers' Game 3 win over the New York Knicks, Joel Embiid revealed he has been suffering from Bell's palsy, a condition affecting the left side of his face and causing blurred vision.

The reigning NBA MVP added eight rebounds and four assists to his half-century as the Sixers dragged themselves back into their first-round series after two road losses.

He became the first player in playoff history to record a 50-point game while attempting fewer than 20 shots, going 13 of 19 from the floor and making 19 of 21 free throws.

He did it while suffering from a condition which causes temporary weakness or lack of movement in one side of the face.

Embiid has to continually use eye drops to combat the blurred vision, and he says the symptoms could last for weeks or months.

"I think it started a day or two before the Miami game [in the Play-In tournament], and I had bad migraines and thought it was nothing," Embiid said in his post-game press conference. 

"It's pretty annoying, you know, with the left side of my face, my mouth and my eye. So yeah, it's been tough.

"I'm not a quitter, so I've got to keep fighting, but yeah, it's unfortunate. That's the way I look at it. It's not an excuse. I've got to keep pushing."

Smiling, he added: "I just hope it could stay like this. I've got a beautiful face. I don't like it when my mouth is looking the other way.

"Like I said, it's an unfortunate situation, but everything happens for a reason. Like I said, I've got to take care of myself mentally."

Embiid has endured a difficult season after landing the NBA's top individual prize last year. He missed two months after undergoing surgery to repair the lateral meniscus in his left knee in February.

Still wearing a brace on the affected knee, Embiid said he is still unable to trust it completely. 

"No, I'm just trying to keep pushing," he said when asked if he had 100 per cent confidence in his condition. "Like I said, I'm not going to quit. 

"Even if it's on one leg, I'm still going to go out there and try, but no, that's not an excuse. I've got to keep playing better and better and better. 

"Tonight I got lucky. I made a few shots. I've got to find a way to rebound, and I don't even care about rebounds. I've just got to make sure that my man doesn't get it, and then box out my man and take him out of the play. Whatever it takes to win."