cold fingers turn white

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Dr. Carlos M. Kier answered:

Can Raynaud's phenomenon ever be truly dangerous, to the point of losing fingers or toes?

Yes

Extremity-upper-hand-thumb
In severe cases of Raynaud's gangrene may develop in the finger tips and toes. This is often related to concomitant nicotine abuse and is seen in patients with severe Scleroderma. It should be emphasized this is not a common occurrence.
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Dr. Lisa Davidson answered:

Can bactrim cause Raynaud's phenomenon? I had a severe allergic reaction a couple weeks ago and now have one finger that turns white and tingly/numb.

Don't think so.

Allergies
Raynauds is an auto-immune disorder, meaning your body is producing the reaction from the inside. I have never heard of Bactrim causing it.
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What causes raynaud's phenomenon? My friends hands turn comp blue with the slightest bit of cold. Doc said it was just RS and was ok

OK?

Raynauds_phenomenon
7% of woman have Raynaud's phenomenon. Most occurs in isolation, but workup is required to assure not part of a larger problem. This does not just mean laboratory studies, but requires assessment by a knowledgable/experienced physician.
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Dr. Robert Kwok answered:

What is the difference between Raynaud's phenomenon and cold feet?

Other cause possible

Cold_feet
Raynaud's phenomenon is a well known cause of cold hands and feet due to spasm of blood vessels supplying blood to the hands or feet. Other conditions can decrease blood flow to the extremities, leading to cold hands and feet. A primary care doctor can evaluate for anemia, peripheral artery disease, hormonal imbalances, autoimmune disorders, smoking (nicotine), drug side effects, etc...
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Dr. Rodeen Rahbar answered:

What is Raynaud's phenomenon?

Red, White, and Blue

Blood
Named after a French physician, Raynaud's is improper regulation of blood flow. Pain and changes to the colors of the fingers and hand in response to cold (air conditioning, ice cubes, etc) or stress occurs as follows: the fingers turn white as the blood vessels constrict, then turn blue as the oxygen levels drop, then turn red upon rewarming. Usually benign, but see your doctor to be sure!
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Dr. Robert Kwok answered:

Is it possible to die from Raynaud's phenomenon?

Very unlikely

Saline_nasal_spray
Raynaud's phenomenon decreases blood flow to the fingers, toes, nose, ears, or nipples, but the rest of the body should be ok. It would be very unusual to die from Raynaud's phenomenon. Hypothetically, if a person got gangrene in a finger or toe, then got infected there, and was unable to get any treatment, his infection could spread to the rest of his body, leading to death by sepsis.
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What is the treatment for Raynaud's phenomenon?

Warmth and CA-block

Heart
Keeping hands warm and dry is the thing everyone should do. I think in terms of drug prophylaxis or for diminution in severity of the Raynaud's, calcium channel blockers are the best therapeutic option. I favor diltiazem over verapamil (less constipation and slowing of heart rate), and over nifedipine and amlodipine (less edema). However, all are fine and work. Others may use nitroglycerine paste.
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Any summertime symptoms of raynaud's phenomenon?

Yes

Smoking
Raynaud's can occur at anytime of year but is less common in warmer weather. Smoking and excessive caffeine can worsen the symptoms. Also, minimize the handling of ice cold beverages. Keep air conditioning settings at comfortable, not cold. Be aware that restaurants and more expensive stores keep the temperature settings low.
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What are the tests for Raynaud's phenomenon?

History and physical

Raynauds_phenomenon
A history and physical is the most important test. You will need an examination to clarify the diagnosis and find out why Raynaud's is present. We can see it by itself, in families or associated with a variety of illnesses inclduing connective tissue diseases. These diagnoses will require a variety of tests to look at these diagnoses
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Dr. EVAN Leibowitz answered:

Is raynaud's phenomenon common?

Yes

Low_temperature
Raynauds is a hypersensitivity to the cold of the small vessels of the extremities (hands and feet). Most people with raynauds have no other disease associated with it. Occasionally raynauds is associated with an autoimmune disease.
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