Pallor is more evident on theface andpalms. It can develop suddenly or gradually, depending on the cause. It is not usually clinically significant unless it is accompanied by a general pallor (palelips,tongue, palms,mouth and other regions withmucous membranes). It is distinguished from similar presentations such ashypopigmentation (lack or loss of skinpigment) or simply a lightly-melanated complexion.
In patients withdark skin, pallor is more subtle and harder to detect, often manifesting as a more grayish or ashy tone of skin in individuals with very dark brown skin, or alternatively a more yellowish tone in individuals with lighter brown skin. Assessing the palms, soles, andmucous membranes with appropriate lighting in such cases may make detection easier.[1][2]
^Drummond, Peter D. (October 1997). "Correlates of facial flushing and pallor in anger-provoking situations".Personality and Individual Differences.23 (4):575–582.doi:10.1016/S0191-8869(97)00077-9.
^Poterucha, Joseph T.; Bos, J. Martijn; Cannon, Bryan C.; Ackerman, Michael J. (1 August 2015). "Frequency and severity of hypoglycemia in children with beta-blocker–treated long QT syndrome".Heart Rhythm.12 (8):1815–1819.doi:10.1016/j.hrthm.2015.04.034.ISSN1547-5271.PMID25929701.
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