- See also
{{Unreferenced|date=July 2018}}When skin is blanched, it takes on a whitish appearance as blood flow to the region is prevented. This occurs during and is the basis of the physiologic test known as diascopy.{{Citation needed|date=February 2009}} Blanching of the fingers is also one of the most clinically evident signs of Raynaud's phenomenon.{{Citation needed|date=February 2009}} Blanching is prevented in gangrene as the red blood corpuscles are extravasated and impart red color to the gangrenous part. See also{{dermatology-stub}} 1 : Dermatologic terminology |