[HOW I EXPLORE... SKIN COMPLEXION BY ANALYTICAL APPROACH].

Skin colour is important for interindividual relationships considerations, as well as for the assessment of some physiopathological aspects. Its subjective assessments varies among observers and according to light. By contrast, an objective approach, both qualitative and quantitative by analytical measurements, has been available for some years. Its application in routine clinical settings is possible. The aspects are dependent on the incident light wavelengths. Accordingly, a series of skin diseases, but also ictera, uremia, anemia and hemochromatosis are possibly assessed in the field of internal medecine according to variations of skin colors.