Kim Kardashian has been diagnosed with a small aneurysm in her brain, she revealed Thursday in the season premiere of “The Kardashians.”

“There’s, like, a little aneurysm,” Kardashian says in the episode, over footage of her going into an imaging scan.

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"Woah," her sister Kourtney Kardashian Barker responds.

Kardashian didn't respond to a request for comment.

Here’s what to know about aneurysms.

An aneurysm occurs when an artery swells into a balloonlike shape. It happens when blood pumping through the blood vessel stretches out weak or thin artery walls.

Aneurysms can occur anywhere in the body, but they are most commonly in the aorta , the body’s largest blood vessel, which carries blood out of the heart

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