Raynaud's phenomenon is a condition where small blood vessels in the fingers and toes suddenly narrow in response to cold or stress. This causes the classic color changes: white (reduced blood flow), Fertility Lubricant, 2.5 fl oz (75 ml) Raynaud's causes your blood to stop flowing properly to your fingers and toes. When you're cold, anxious or stressed, your fingers and toes may change colour. Find out more about symptoms and Doctor explains Raynaud's disease and syndrome Causes, prevention and treatment Fertility Friendly Lubes: Helpful or Hype? Hand Arm Vibration Syndrome FAQs News Shawcity