Kendall Jenner Reveals Health Struggle

Reality TV star Kendall Jenner admitted she has a problem that affects millions of people. Dr. Richard Besser weighs in.
4:10 | 11/02/16

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Transcript for Kendall Jenner Reveals Health Struggle
Back here on "Gma" and that is Kendall Jenner tackling the runway but the supermodel is revealing a secret health struggle describing what may be sleep paralysis. ABC's Paula Faris has more. Everyone says I'm fine but I don't feel fine. Reporter: In a sneak peek of "Keeping up with the Kardashians" Kendall Jenner revealing a health scare. I wake up in the middle of night and I can't move. Reporter: Describing what doctors say could be sleep paralysis when you're temporarily unable to move or speak while falling asleep or waking up but your mind is completely awake. For many people it's this feeling of almost fear that you want to move your body but you can't. It typically lasts for a few seconds to as long as two minutes. Reporter: Kendall's mom Chris Jenner questioning if her symptoms are as serious as she feels. I think you've just got anxiety. I'm done arguing with people because I don't feel fine and I promise you one day when I'm rushed to the hospital, then you guys are going to wake up. Reporter: Jenner a reality star since 2007 and a professional model since she was 14 years old has admitted to stress in the past. A lot of times in our country we're very busy, we're not making sleep a priority. If you're not getting good quality sleep and not getting enough sleep you're at a greater risk for having sleep paralysis. Reporter: No one knows for sure how many people suffer from it but it's most commonly triggered by lack of sleep and stress. For "Good morning America," Paula Faris, ABC news, New York. We're going to bring back Dr. Richard Besser and also ginger, you were talking at the break that this is something that you've suffered with. I heard you guys were doing the story just this morning I thought. Well I have that and have a doctor's appointment today. I've had narcolepsy. I knew that was really wrong excessive tiredness I was having sleep paralysis. I thought it was bad nightmares then your whole body -- you can't move and your brain is going nuts. What is happening is this a nightmare so I kept associating it with that "Then" I had the other narcoleptic things. Doing much better. I still get it once in a while. Now because I know what it is there is -- still frightening. People are waking up this morning and going, what are we talking about and it is about reducing your stress. We all need to do that. So many people when they heard we're doing this tell me that happened to me. That happened to me and while stress and lack of sleep are the main cause, things like narcolepsy can be there as well but there are things that we can do in terms of improving our sleep and reducing stress that can actually help. We have to have a shooting environment. Yeah, we talked about the importance of routine but there are things you can do to try to make your environment more soothing for you. Such as. Well, we know that one of the ways that our body tells itself is there is a rise in melatonin but bright light and blue light can inhibit our body's release of that so there are things we can do. One is just dimming the lights but a couple of cool things. I've got these Orange glasses and when I put those on, take a look, this is what it looks like, the environment changes. Okay, and what that does it allows her body to release more melatonin. Put them on for a couple of hours before bed small studies show it may make you sleepier. On our electronic devices, you can hit something called night shift and it turns your screen colors from blues to Oranges. Other devices you can download that as well. Little things you can do that may help you get a better night's sleep. Turning off your electronics an hour before bed is a good thing too. Do you do things like that. The routine is supposed to be number one which I'm not so great at especially with our schedule but I keep the phone away. A big one for me. I can tell a big difference and out of the room and then what I also do is that calming, I've been using lavender, some of those things. I do that too. Important. Bless your heart. Well -- Funny when you do stories like that and she comes out and goes, hey -- 1 in 2,000 people have narcolepsy. If you have 24 get it checked out. Don't ignore it. Coming up what's being called the anti-helicopter parenting

This transcript has been automatically generated and may not be 100% accurate.

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