More importantly, is it anything to be concerned about?
Today it happened when I was working in a chilly office.. clicking away on the mouse with my right hand. No problems till I left and blasted the heat in my car. My right hand/fingers became extremely swollen, warm to touch, pink/red, and itchy by the time I got home 10 minutes later. Here's a picture of my normal left hand and my messed up right hand: http://oi52.tinypic.com/9h8f80.jpg
Most of the swelling went down in a couple hours. 10 hours later it's still slightly swollen.
This has happened before to my toes when taking a shower after my feet were kind of cold. It's happened to my cheeks, ears, and belly after playing a hockey game and entering my warm car. It's happened to my legs when going for a run in warm weather. It's happened to my lip when coming inside from a cold, rainy day. This has been going on for maybe 10 years; I'm 26.
I've read about Raynaud's and it doesn't seem to fit. My extremities don't feel that cold they certainly don't turn blue. The problem happens with the temp change. Also, an allergy doesn't make any sense to me.
I assume it's a sensitivity to quick temperature change from cold to warm. Does anyone have any insight about this?