Hi Sue,
I definately think it's possible. I actually believe the cause of my CRPS caused by hitting a nerve or muscle at the site.

I have had other limbs other than my left arm affected by now. I'm going through some testing now, to make sure it's not something else like Lyme or Rheumatory Arthritis etc. but I strongly believe I have it as does my Orthopedic Surgeon. I have burning (mostly when cold). Cold limbs all the time, swelliing in 3 of my limbs and shiny red/bluish skin etc.

It seems funny all this started after attempting to donate blood, wouldn't you say? Could be a quincidence if I had swollen joints I didnt know about which caused her to hit something, but who the heck knows. I'll find out soon (I hope)

Anyways, so glad you are alright. That must have been such a frightening experience for you. My heart goes out to you and I hope it never happens again.

Please take care!

GHL