Rheumatoid Arthritis Support Group
Rheumatoid arthritis is a chronic, inflammatory, multisystem, autoimmune disorder. It is a disabling and painful condition which can lead to substantial loss of mobility due to pain and joint destruction. The disease is also systemic in that it often also affects many extra-articular tissues throughout the body including the skin, blood vessels, heart, lungs, and...
I think it's worthy of a doc call - do let us know if you figure it out!
good luck. hope everything goes fine.
http://www.drweil.com/drw/u/QAA350574/Metallic-Taste-in-Your-Mouth.html