Hi, have you been investigated for Raynaud’s disease, it is associated with spasm of blood vessels in cold environment leading to numbness and tingly sensations. Other possibilities are dermatitis, allergic manifestations etc..
Sometimes with neck problems you will get tingling in you fingers and hands. Normally more in the fingers. It's something you should get checked out. I have tingling in both my hands all in my fingers from damage in my neck. The only way to really find out is to see a doctor if this doesn't go away in a few days.
the itching could be dermititis- when its itchy and u itch (hard) does it come up in tiny bumps (looks like dots) under the skin? or have u got peeling on your hands- lots of people have dermititis and generally comes out only when ur around alot of chemicals (cleaning the house no gloves ect) dont get it most of the time.
the pain in your finger is probably a damaged nerve but it should be fine i think i had the same tingling pain thing ages ago but it goes... unless (how long hav you had this for?)