In that case, be very careful applying ice. Use a timer, as over exposure to ice can cause frostbite, and since your sensory nerves aren't functioning well, you might not feel the pain of tissue necrosis.
No exposure to ice longer than 15-20 minutes, with at least that much of a break between sessions.
Thank you yes I know. I would think that it's an ulnar nerve entrapment but I
Don't have numbness just burning pain and the fingers are always cold as if it's been in ice but others can't feel
The coldness.
CPRS Type II is a complex syndrome. Even trained pain doctors have a difficult time making a diagnosis.
You are recovering from surgery that has effected the brachial plexus and it is no surprise that you're feeling dysthesias along related nerves.
However, if you believe you are developing this disease, consult with a board certified pain doc -- a DABPM.