joed,
I'm a dentist not a physician but you might want to check out a condition called Raynaud's Syndrome.
Here is some info I copied...I'll give the link at the end.
Raynauds Syndrome
Raynaud's syndrome, which may afflict up to 1 in 20 Americans, is a circulatory disorder of blood vessels of the extremities. Constriction of those vessels is a normal physiological response to low temperatures, helping the body conserve heat. In Raynaud's syndrome, named for a French physician who first described the condition more than a century ago, nerve receptors in the extremities are overly sensitive to stimulation. Even a slight temperature drop perhaps the faint chill produced by opening a refrigerator door will cause a spasmodic closing of the small arteries in the fingers (and sometimes in toes). Typically fingers turn white, then blue, then red, indicating a progression from total blood deprivation to limited blood flow to sudden infusion of oxygenated blood as blood vessels suddenly dilate. Episodes are brief, usually lasting only a few minutes.
The syndrome takes two forms. About 90 percent of cases are of the type called Raynaud's disease or primary Raynaud's an isolated condition with no connection to other medical problems. It most often affects women and usually sets in before the age of40 . The remaining 10 percent of cases are termed Raynaud's phenomenon or secondary Raynaud's. This version, which tends to start later in life, is connected to other medical factors; an underlying disease, for instance, or the long-term use of such vibrating tools as a chain saw or jackhammer.
For most sufferers, Raynaud's syndrome is a mild but maddening condition. Ordinarily, its most serious consequence is a loss of sensitivity in the affected extremity. Very rarely, a severe case results in tissue death and gangrene.
Symptoms
* Sudden coldness, numbness or prickly pins-and-needles sensation in the fingers, and possibly toes, when exposed to even a mild drop in temperature as when walking into an air-conditioned room, for instance. The same symptoms might also be triggered by emotionally stressful situations.
* Dramatic color changes in the fingers: When first exposed to cold, fingers turn white, then blue; when rewarmed, they quickly turn red and may throb uncomfortably.
Causes
The underlying causes of Raynaud's disease are unknown. It afflicts women disproportionately; men account for only about 1 case in5 . It is not thought to be an inherited condition, but it frequently affects more than one family member.
Raynaud's phenomenon has many causes, including such connective-tissue diseases as scleroderma, rheumatoid arthritis, and lupus; exposure to certain chemicals and drugs, such as beta-adrenergic blockers (used to treat high blood pressure) or ergotamine (used to treat migraine headaches); and use of vibrating machinery (see Work-Related Problems).
Treatment
Relief from Raynaud's is linked to improved circulation. Some exercises may help by forcing blood into the extremities, but relaxation techniques can also work. Of course avoiding triggers such as cold or nicotine will decrease the number of attacks.
Conventional Medicine
For most people, Raynaud's syndrome is not disabling enough to merit prolonged medical care. If attacks are frequent or severe, dilating, such as nifedipine, calcium channel blockers may be prescribed. A simple exercise swinging your arms around like a windmill will force blood into your extremities and may be as effective as drug therapy.
At-Home Remedies
You can train your fingers to resist chills. Starting in a warm room, place your hands in a warm bowl of water for 5 minutes; then move to a cold room or outdoors and again place your hands in warm water, now for 10 minutes. Repeat the procedure several times a day for as many days as necessary. Eventually, this will produce a conditioned reflex that is the very opposite of the normal one: When exposed to cold, the blood vessels in the fingers will open up rather than close down without the aid of warm water.
Avoid substances that make you vulnerable to chill. These include nicotine, caffeine, birth-control pills and most over-the-counter decongestants, cold remedies or diet pills.
Treat finger or toe infections without delay. When circulation is impaired, even minor infections can become a problem.
Prevention
Devise ways to stay warm in your own home or office. Always carry a sweater. Use insulated glasses. Keep fingers and toes dry with talcum powder. Wear socks and mittens to bed. Outdoors, wear loose layers of blended fabrics; shoes made of breathable materials; a hat and, perhaps, earmuffs; and mittens rather than gloves. If you plan to be outside for several hours, try chemical "heaters" in your socks and mittens.
Call Your Doctor If:
* Raynaud's episodes become more intense. Irreversible damage to fingers or toes a loss of feeling, for example can occur in serious cases.
* Skin ulcers, sores, or discoloration appears on your fingers or toes. These signs suggest that extremities are being severely deprived of blood. In rare cases, gangrene may result.
http://www.lebanonhealth.com/condi/707.htm
Hope this helps.
Laurence Stein DDS