By Gary M. White, MD

The flag sign is the presence of alternating light and dark bands of the hair in a patient suffering from intermittent bouts of malnutrition. Light bands develop at the root of the hair during periods of malnutrition. If periods of malnutrition alternate with periods of adequate nutrition, multiple light and dark bands form which are reminiscent of the stripes on a flag.


Adequate nutrition is curative.


Depigmentation of hair with malnutrition and repigmentation after restoration of nutrition. An. Bras. Dermatol. vol.86 no.6 Rio de Janeiro Nov./Dec. 2011

AD 1987;123;1674
Cutis 1993;51;445


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