I have had for a long time a diffrent sensation down my back. from shoulder blade down to my lower back. I did not realize it was a numb sensation until my husband was putting some bengay on my back cuz of this feeling and realized I could not feel the coolness that should have been there. However my muscles still feel tense and they are bothering me some. Lately I am also feeling the same sentation in my fingers at work when IM running the cashregister. Has anyone here ever experienced this.