Kris Jenner has disclosed what some may see as a shocking revelation when it comes to her son Rob Kardashian's health issues.

Kris Jenner Speaks Out About Son 'He's Working On Himself'

In a trailer for an upcoming episode of Keeping Up With The Kardashians, Jenner broke down when thinking about her son's struggle to lose weight. During the time of taping the Kardashian/Jenner clan, sans Rob, was on a family vacation in Thailand. Kris Jenner and Kim Kardashian were talking about how Khloe Kardashian wanted to go home the night before to check on her younger brother. Last season Rob's weight issues caused him to withdraw from lots of family activities, which could have caused his absence in the family trip.

Jenner revealed that she was having trouble coming to terms with the fact that she can't "fix" Rob.

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"I have not not cried myself to sleep in so long I don't even know what that's like. I go to bed every night worried about everybody. And I'm sure Khloe is doing the same thing...It makes me appreciate when life is good and I can lay my head on the pillow and go to sleep and go, 'Ok let's go down the list... Kourtney's great, Kim's great, Khloe's great, Rob's great, Kendall's great, Kylie's great..."

Kris could no longer hold back tears and said she had the "worst feeling in the world" while being concerned for Rob not being "in a good place."

She added that she felt tortured being across the world without her son.

"I can't control someone else's behavior. I feel like the weight of the world is coming down because I try to micromanage everything."

Check out the clip here and tune in to Keeping Up With The Kardashians Sundays at 9/8c on E!

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Keeping Up With The Kardashians, E!, Reality TV