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Typically the fingers, and, less commonly, the toes, are involved. [1] Rarely, the nose, ears, nipples, or lips are affected. [1] The episodes classically result in the affected part turning white and then blue. [2] Often, numbness or pain occurs. [2] As blood flow returns, the area turns red and burns. [2]
Finally, oxygenated blood turns the previously white areas red. "That red phase is associated with a lot of pain, discomfort, numbness, tingling, burning sensations before it completely normalizes ...
Peripheral cyanosis is the blue tint in fingers or extremities, due to an inadequate or obstructed circulation. [5] The blood reaching the extremities is not oxygen-rich and when viewed through the skin a combination of factors can lead to the appearance of a blue color .
Blanching of the fingers is also one of the most clinically evident signs of Raynaud's phenomenon. [ 1 ] Blanching is prevented in gangrene as the red blood corpuscles are extravasated and impart red color to the gangrenous part.
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Peripheral neuropathy may be classified according to the number and distribution of nerves affected (mononeuropathy, mononeuritis multiplex, or polyneuropathy), the type of nerve fiber predominantly affected (motor, sensory, autonomic), or the process affecting the nerves; e.g., inflammation (), compression (compression neuropathy), chemotherapy (chemotherapy-induced peripheral neuropathy).
Raynaud’s disease is a rare peripheral vascular syndrome that narrows blood vessels, generally in the hands and feet, due to cold or stressful emotion. [8] It is recognized by the reduction of blood flow to fingers and toes with periodic spasm and results in a drastic color change to white or blue.
In the elderly, paresthesia is often the result of poor circulation in the limbs (such as in peripheral vascular disease), most often caused by atherosclerosis, the build-up of plaque within artery walls over decades, with eventual plaque ruptures, internal clots over the ruptures, and subsequent clot healing, but leaving behind narrowing or ...