Kendall Jenner has revealed she has "full panic attacks" since being granted a restraining order against a stalker.
The 21-year-old model spoke about her ongoing battle with anxiety, and said she still wakes up in the middle of the night "freaking out".
"I don't feel normal and I like to feel as normal as I possibly can," she told Harper's Bazar.
"I wake up in the middle of the night freaking out. Full panic attacks. They wake me up from my sleep, and I need to stand up and I pace and I'm freaking out and crying."
The attacks, she said, escalated last year, after the Kardashian sister arrived home in the middle of the night to find a man sitting at the edge of her driveway.
The stalker then walked up to her car and banged on her window.
Describing herself as "more of a Jenner than a Kardashian", Kendall says she struggles to maintain her privacy, keeping details of her personal life away from public scrutiny or her family's reality TV show.
"Just 'cause I think it's powerful. Plus, I think people always want what they can't have. It's nice to have some mystery."
Her sister Kim's robbery in Paris last year also contributed to her anxiety, and Kendall now has an armed security guard with her at all times to make her feel safer.
Earlier this month, the model was the target of online criticism after starring in a controversial Pepsi advert.
The TV promo shows people at a rally carrying signs saying "peace" and "join the conversation", all stopped when Kendall hands a can of Pepsi to a police officer.
With 79 million followers on Instagram, Jenner is now one of the most successful models working in the fashion industry, but says she sees herself as a tomboy - something she attributes to her father.
"I was a huge tomboy. I had a phase where I wore boys' clothes. I was always hanging out with guys. I've always connected with guys more."
Kendall is the daughter of Caitlyn Jenner, the Olympic champion previously known as Bruce Jenner.
"I've always been the different one," she said.
"I mean, I'm a girl and I like being a girl, but I've just never been into it like they have."