“…With 0.5% polidocanol, the rate of hyperpigmentation was lower with liquid sclerosant (12.5%–30%) 7,10,13,14,17,18 than with foam (13%–67.9%) 10,13,15–17 . With polidocanol 1%, the rate of post‐treatment hyperpigmentation associated with liquid polidocanol 7,10,12–14,17,19,20 was higher than that associated with foam 10,13,16 (14.3%–73% vs. 14.8%–23%). The volumes used were not always mentioned in the publications.…”