What is the definition or description of: raynaud's disease?

White fingers cold: It is vascular spasm in the fingers, toes, and can even involves the nose and ears and internal organs the blood vessels of the heart or kidneys in response to cold or stress causing the external elements especially the fingers, toes to turn white. Blue and red can also occur but I like to Emphasize if not white I can not be clear. Others may have different criteria