Zoe Sugg may be one of the most successful celebrities on YouTube, but little do some know that she has health conditions that create a big damper on her life.

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On Thursday, Mirror announced from Sugg's piece with Glamour that the British vlogger has a serious anxiety disorder that she's dealt with since she was a teenager. At 25-years-old, Sugg opened up on the frightening symptoms she's gone through and how difficult it was to even go anywhere.

"My initial symptoms would happen whenever I felt in a situation where I felt I couldn't leave," she said. "My heart would race; I'd feel sick; my breath was short and quick; I felt like the room was closing in on me."

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"It's almost like a part of my brain is telling me that I cannot leave and I am stuck, even though my conscious mind knows that isn't true," she continued. "The subconscious mind is far from powerful."

Sugg, who's in a relationship with YouTube celebrity Alfie Deyes, admitted that sometimes she deals with anxiety attacks more often than one might assume.

"Anxiety is a very large part of my life and I can experience it in some form every single day," she said. "When it's bad, I can't even leave my bed or I'll start my day off by opening my eyes and having a panic attack."

Tags: Zoe Sugg Alfie Deyes