Medical professionals were called to the scene to supply the beauty boss with oxygen through an oxygen mask.
But if you go through a dramatic incident and your friend doesn't Snapchat it, did it even really happen?
Kylie's long-time bestie, Jordyn Woods captured the entire thing on Snapchat and added it to Kylie's story.
Ah, to be alive in 2017!
In one of the Snapchat vids, Kylie's doctor explained why the Keeping Up With The Kardashians star couldn't breathe.
“So at this altitude of 11,000 feet above sea level, you can feel nauseous, have headaches, and feel like you have the worst hangover,” he said.
“So Kylie’s getting oxygen so she’ll feel better.”
Well that's a relief!