Question- please help

So I don't know if this is a anxiety thing or a depression thing or something else, but I don't really know how else I can find my answer right now.

For a while now, whenever I heard/read/or even thought about someone self-harming, my wrists would tingle. It feels like energy or bits of electricity is crawling beneath my skin. I was wondering:

1. Why do my wrists tingle?

2. Has anyone experienced anything similar?

3. How do I make it stop?

The only thing that I have found so far that has even kind of worked is putting pressure on my wrists whenever they tingle, but that's not a long term solution, and it doesn't even help all the way. So, yeah. Please please please help.