Do hydrocolloid pimple patches actually work?

Verified-purchase reviewers overwhelmingly report that hydrocolloid patches like Mighty Patch and Rael work best on whiteheads that have already come to a head, drawing out fluid overnight and flattening the bump. They are far less effective on deep, closed cystic or hormonal pimples that haven't surfaced. For those, a medicated treatment with benzoyl peroxide or salicylic acid is the more commonly recommended route.