One of the common causes of staining after sclerotherapy is vessel wall perforation from inappropriate concentrations of sclerosants. In this case, Polidocanol 0.5% was used which is considered standard concentration for treatment. As we pointed out in our publication, ‘Evaluation of sodium tetradecyl sulfate and polidocanol as sclerosants for leg telangiectasia based on histological evaluation with clinical correlation.’ Polidocanol 0.5% is an inappropriate concentration. Once perforation has occurred, there is a technique to prevent staining. Find out more at Aesthetic Vein Conference, West Palm Beach Marriott Hotel, April 27, 2019!