Abstract
From my clinical experience, a significant percentage of troubles accompanied by the use of cosmetic products is caused by their misuse; (in spite of that), however, (disregarding such misuses by consumers), there are many cases in which they are caused by inferior quality products. As to beauticians, who are experts, their practice based on only their experience can lead wrong from medical point of view and may cause some troubles. (This is the first report and the second will report on statistical observation on their use at home.)
