Twinges?
 

I am wondering if something is wrong with me. I SI in the same location, and while I never cut deep (all my cuts are pretty shallow), I've started getting twinges down my left arm/in my wrist. Is it possible I'm damaged a nerve or something going over the same area again and again?

Thanks.

I'm not sure what the twinges are, I just thought I'd let you know that the same happens to me (I also never cut deep).

I just assumed it was the skin and that repairing...

Never happened to me and i always cut in 2 places, i often go deep as well, it may be nerve damage, i don't know.