I have a screw lose in my face from reconstructive surgery 16 years ago. Any suggestions?

It started with a metallic taste only on my right side of face. I went to dentist,ENT, Neurologist and finally the plastic surgeon who actually did my surgery 16 years ago. In the mean time I started having the weird sensation such as the burning, and feeling cold. Not one of the Drs I have seen can tell me what is wrong but do seem to think it maybe nerve damage. I recently went to plastic surg. and he has my mri and ct scan but doesn't think it has any thing to do with the loose screw.

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