Strange Involuntary Reaction

by Sarah
(Hampshire)

Photo Credit: Stuart Pilbrow

Every time someone's angry or someone's shouting, even if it isn't directed at me, I shiver. It's always happened, as far back as I can remember. Can someone tell me why this is? It's obviously not a huge problem, it's just weird!

I had a very happy childhood, parents are still together, etc. My sister was really horrible to me growing up and still is to some extent, I'm 23 now and she's 25, but I don't know how much that's affected me.

I've never liked loud noises, like when I was little and a lorry went past I'd cover my ears and I didn't like hand driers. Yeah, so there's a brief background, any theories would be very much appreciated.