“…Our study group previously described a 26‐year‐old Korean man with facial flushing who experienced satisfactory clinical improvement after three sessions of 595‐nm pulsed‐dye laser treatment after provocation of flushing with topical niacin cream 5 . The purpose of using topical nicotinic acid cream was to allow more definite margins to be treated by enhancing vessel dilatation and filling dilated vessels with erythrocytes containing haemoglobins, the primary target of vascular lasers 5,6 . Topical niacin cream, which we used in this study, is commercially available and contains various compounds, including acrylate/C 10–30 alkyl acrylate crosspolymer, vitamin‐B, glyceryl, polymethacrylate, propylene glycol, methylparabens, propylparabens and imidazolidinyl urea 5 .…”