TEWL and SCH increased significantly compared to the previous timepoint (TEWL: +62.44%, SCH: +30.06%, both P < 0.001), while the increases in EI, pH and temperature did not reach statistical significance (all P > 0.200).
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Mask wearing impacts skin barrier function and microbiome profile in sensitive skin.
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21 investigated the microbiome variation during wearing masks earlier in 2020 and found that the diversity of the facial microbiome showed a decreasing trend after wearing masks.
The pH of masked and unmasked areas showed an increasing trend than the previous timepoint, but the differences were not statistically significant ( P = 0.173, Fig. 4 d).