Oh, congratulations..........I think!

Sounds like a good theory to me.  Plus I suspect that the signal the
brain receives from the newly regenerated nerve is probably noisy at first.

This maybe answers to the question "why an itch".  The system is there
to defeat parasites: the brain picks up small localised abnormalities in
touch signals as indication of something small trying to breach the skin
barrier, and maps that sensation to a scratching reaction to remove or
destroy the aggressor.

Now the 'normal' state for a disconnected nerve is silence. A small
erratic signal in that context, even if it is just the nerve's normal
background noise level, is a local abnormality, exactly what the itch
circuit is set to detect.  So it's pretty inevitable that a nerve
'newly' connecting is going to show as an itch, at least until the brain
has normalised its background signal and dynamic range.

Tim

Thanks!  It's already quietened down quite a lot and I've got a
considerable return of sensation.

So happy you posted this information. I had a R Mastectomy in October 2004
and sensation has come back just recently and just as you said with a deep
itch! If I had not seen your post I would have wondered what was going on!
Greta