Figure 1.

Screening questions for Raynaud’s should include:

1. Are your fingers unusually sensitive to the cold?
2. Do your fingers change color when they are exposed to cold temperatures?
3. Do they turn white, blue, or both?

Generally, the diagnosis of Raynaud’s is confirmed if there is a positive response to all three questions.

Source: http://www.nhlbi.nih.gov/health/health-topics/topics/raynaud/