An exaggerated physiological response to cold exposure or emotional stress where the extremities turn white (ischaemia) then blue (deoxygenation) then red (reperfusion), is called Raynaud's phenomenon.¹ Causes of a Raynaud's phenomenon: Although the vast majority of RP is primary (idiopathic, PRP), RP can be secondary to a number of different conditions, including connective tissue disease.¹ … Continue reading Raynaud’s Phenomeon