CRPS = COMPLEX Regional Pain Syndrome not Chronic
The Complex bit is for the complex about it;
Pheripheral nerves,bloodwessel,muscle and bone(osteoporoses)an the sympathetic nervous system
So to say Chronic for the C would be wrong
There are a RSD/CRPS forum her if you have Questions:
http://neurotalk.psychcentral.com/forumdisplay.php?f=21
And YES it does spread!