Because PN's tend to be "chemical", I don't think a scan with the radiation risk is going to show much.
Those scans are for illuminating abnormal masses and cancers.
Therefore "gross" changes in tissues. The biochemical disorders tend to not show up on imaging.
An MRI of the head may show lesions there however. Since your pain is "everywhere" you might investigate MRI of the head and neck. Abnormal blood vessels (AVMs), in the brain, lesions, or masses, may show up...central pain states may come from ministrokes for example.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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