Is it 'numb'? Which limb(s)? Is there any pain involved.

An opposite phenomena is called 'phantom limb pain' - it's where the limb has been amputated, yet pain signals still reach the limb, giving the feeling that it is still there.

Is this issue something that comes and goes? Or is it constant

Give us a wee bit more to go on and maybe I can help refer you to a forum here at NT that could give you more insight.

Caring
Rae