On Sunday I sat for the remainder of the outline to be completed on a piece being done on my left ribcage/side.  While sitting for the tattoo I was laying down and had my left arm stretched up and resting over my head.  Since leaving the tattoo parlor Sunday evening and up until now I am experiencing numbness to that “asleep” feeling in that left upper arm.  It seems to be a little less today but I was wondering if anyone else has experienced such a thing?  I am wondering if maybe I somehow pinched a nerve?