(NEXSTAR) – Kim Kardashian, the entrepreneurial reality TV star and criminal justice reform advocate, revealed that she was diagnosed with a brain aneurysm.

In teaser clips that aired during the season premiere of "The Kardashians" on Wednesday, the SKIMS founder is seen undergoing an MRI and telling her family, "there was a little aneurysm," People and The Today Show reported.

Kardashian, 45, is also shown explaining that aneurysms can be caused by stress, but it's a bit more complicated.

A brain aneurysm occurs when a blood vessel in your brain bulges or balloons, the Mayo Clinic explains. The blood constantly flowing through your vessels can put pressure on a weak area in or around your brain, or an artery, according to the Cleveland Clinic. The bulge or balloon can then grow in the weakened area.

In addition to "wear and tear" on your arteries, the

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