Your thumb has no circulation, relax your thumb in a warm area or some lukewarm water, message your thumb out in some heat.

Hi,
I had a simular problem only my two fingers and thumb were involved and painful it was difficult using my hand for anything. They had no color and would turn purple when imerged in warm water. I was diagnoised with raynauds disease. The pain has gone some what and my fingers still go purple in warm water. At one point they couldn't get a pulse reading in my finger. I had neverheard of such thing but recearch it and see if you thing this is want is going on. Cold makes it worse. I had people tell me it could be corpal tunnel. Let me know what you find out or if it persists
ctg

Well it is probably carpal tunnel but I would ask your doctor first.
It depends what type of pain and aching you hsve in the numbness in your finger and thumb.
I pulled up some information maybe this will help.

One of the earliest signs of carpal tunnel syndrome is numbness and pain in the hand at night. The distribution is distinctively in the thumb, index and middle fingers of the hand.

: carpal tunnel syndrome results from compression of the median nerve at the wrist. It can present, as noted above, with nighttime findings which may progress to daytime pain, numbness and weakness of the thumb. Carpal tunnel syndrome is often seen in patients who do repetitive tasks such as typing, writing or knitting, for example.

: try making a fist and then flexing your wrist to make a 90 degree angle with respect to the forearm. Hold it there for a minute or so. If this maneuver reproduces the pain, you likely have carpal tunnel. This is known as phalen's test.

: initial therapy for carpal tunnel syndrome is conservative with a wrist splint and avoidance of things that would aggravate matters. Surgery for decompression of the nerve is indicated only after a period of conservative therapy has failed to improve the symptoms.

: speak to a physician about the diagnosis of carpal tunnel in you situation for an opinion. Also, one should be wise to the possibility of a herniated cervical disc in this situation as well.