I m a 57 year old white female in good health. I have had several occasional strange feeling come out of no were its kinda hard to explain, but it starts at the base of my neck and feels like a tight ing feeling running dozen to be,ow my shoulder blades. It s a strange feeling but only lasts about 30 seconds or so. Sometimes I experience these several times a day and sometimes it can be weeks before I feel this. I m at a loss as to what could be causing this.