Xerotic Skin of the Elderly: A Summer versus Winter Comparison Based on Biophysical Measurements

Background: Xerosis, a well-known problem in the elderly part of the population, is often exacerbated in winter with negative effects on daily life. Objective: To describe differences in stratum corneum function of the lower legs in winter compared to summer using objective biometric methods. Methods: The following techniques were utilized: colorimetry, evaporimetry, laser Doppler perfusion imaging, sticky slides (D-Squames®) and corneometry. The reaction to a 24-hour patch test with sodium lauryl sulfate, burning to chloroform:methanol and the whealing response to dimethylsulfoxide were also studied. Results: In winter, the stratum corneum had a looser structure and a diminished barrier function with an increased neurosensory reactivity. Conclusion: The results suggest that the exacerbation of xerosis in the winter is accompanied by structural changes in the stratum corneum, making it looser and more permeable to chemical irritants with a heightened response to neurosensory stimuli.