Pigmented macules of the malpighian mucous membranes have been described under numerous names since the first description by P. Laugier in 1970 of the ‘pigmentation mélanique lenticulaire essentielle de la muqueuse jugale et des lèvres’. In this paper, we show that (1) the lesions may occur in all malpighian mucous membranes, (2) are easily distinguished from melanoma both clinically and if necessary by histology, and we suggest (3) that, whichever the localization is, the condition should be called Laugier’s disease.