By the way, I had a cervical fusion on my neck quite a few years ago and my current aggravation is my neck seizing up. Since I’ve been using that pain salve on my spine and a little of the anti-stress ointment on the back of my neck at night, my neck has been ‘popping’ every morning!! I use a tennis ball to pop my back and now sometimes my vertebrae will shift on their own with minimal effort. GREAT PRODUCT!! Keep up the good work.