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It's all about guts - John C. Kirk — LiveJournal

Jun. 30th, 2007

10:27 pm - It's all about guts

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From:johnckirk
Date:July 1st, 2007 10:57 pm (UTC)
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I've had the tunnel vision twice since then, basically when I stood up too fast (and probably had an accompanying issue like low blood sugar).

The first time was when I stood up, felt dizzy, and collapsed back onto the sofa. I woke up pretty quickly (I think), and my initial thought was "Oh, I must have dozed off", but then I remembered hearing the crashing noise as I fell down and pieced it together.

The second time was when I'd been in the bath too long (along with the room filling with steam), so when I stood up I had to brace myself against the wall and ease down slowly - it was a struggle to stay conscious, and it was a very different feeling from when I've just been tired at the end of the day and I'm about to go to sleep. I was able to resolve that one with the aid of cold water, but it's one reason that I prefer to take showers.

There may be an underlying medical issue here, but I tend to blur over this when I fill out forms (e.g. for blood donation), on the grounds that I've only blacked out briefly, and as long as I'm careful I can avoid it.
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