you'll get more questions about drugs that improve or worsen Raynaud's phenomenon

Colder weather means you'll get more questions about drugs that improve or worsen Raynaud's phenomenon.

About 5% of patients have these blood vessel spasms that cause white or blue fingers and toes...and in severe cases, ulcers or gangrene.

It's often triggered by cold or stress and is most common in young women. It can also be caused by scleroderma, lupus, etc.