Suggest Remedy For Pain In Thumb & Wrist With Blood Vessel Curling

hello i have a lot of pain in my left hand between the base of the thumb & wrist on palm side, have 2 keep a cold rag on it it 2 ease the pain, it has heat in it & looks like a blood vessel curled up n backwards 3, it gets rock hard & very painful & only cool things ease it, ive had emg not carpel tunnel, i think it is some blood vessel constricting or something help im in a lot of pain & keep getting sent in wrong direction what could this be & what kind of dr can help me