<unk>  is common. It occurs in about 70-90% of dark skinned adults and about 50% of dark skinned children. The prevalence in white skinned people is considerably less, but reports range from less than 10% to more than 90%, probably varying depending upon the population studied, and the methods used in the study, e.g. examination conditions and the diagnostic criteria. The ethnic variation may be explained by genetic factors or simply because dark skinned people have greater amount of melanin in the mucosa, making it appear darker (termed racial or physiologic pigmentation). This darker mucosa may make the edematous changes more noticeable, whereas in the mucosa of people with lighter skin types<unk>  gives a milder presentation.
Leukoedema
Hypertrichosis
Lipedema
Papilledema
Phimosis
Green nails
Macular edema
Road rash