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Pallor is a loss of skin or mucous membrane color which can be caused by illness, emotional shock, insufficient exposure to sunlight, or genetics. It is more evident on the face and palms. It can develop suddenly or gradually, depending on the cause.
Pallor is not usually clinically significant unless it is accompanied by a general pallor (pale lips, tongue, palms, mouth and other regions of mucuous membranes). It is distinguished from similar symptoms such as hypopigmentation (loss of skin pigment).
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