Quote:
From Wikipedia, the free encyclopedia
Hypervigilance is an enhanced state of sensory sensitivity accompanied by an exaggerated intensity of behaviors whose purpose is to detect threats. Hypervigilance is also accompanied by a state of increased anxiety which can cause exhaustion. Other symptoms include: abnormally increased arousal, a high responsiveness to stimuli and a constant scanning of the environment for threats.[1] Hypervigilance is a symptom of posttraumatic stress disorder
In this case it means that because you instinctively know that you're at a disadvantage socially, because the things that come naturally to the people around you don't come naturally (or even make sense) to you, you are constantly (though mostly unconsciously) analyzing the minutiae of every situation you find yourself in, to try and compensate for the things you might otherwise miss. You are, without even being aware of it 'hyper-vigilant' - always on your guard - it's extremely stressful, even physically exhausting.
It's a major component of social anxiety and the reason many Aspies need 'alone time' after being in a particularly socially demanding situation. We have to decompress from the tension of trying to keep up with too many subtle interactions at the same time.
But beyond that, I also have the tendency to anxiously worry about everything, analyzing and going over possibilities until I make myself sick with the stress, often for nothing - most of the horrible worst-case scenarios I imagine never come to pass - but I try to be braced for them just in case.