I am 28yrs old, 5'2'' and 155lbs. I had a spinal fussion 15 years ago. I have had lower back pain ever since. About 4 months ago I fell geting out of the tub, ever since then my lower back pain has increased. I am going to get an MRI this week, but my question is when the pain is bad, I can taste it, it taste like metal. Is that the taste of pain or is it even related?