Flow patterns of the cutaneous circulation of the third left finger was studied before and after standardized cold challenge in 140 healthy subjects by means of Laser-Doppler flowmetry. Flow behaviour showed no statistical differences regarding to age, sex and day time. Nevertheless, the results may serve only to a limited extent as a reference in the evaluation of individual test results for everyday angiological diagnosis since the interindividual variability of the flux values is considerable. However, the present data obtained from a relatively large normal population are suitable as a reference basis for scientific investigations using groups of healthy subjects or patients.