These patches are easy to use. All you have to do is clean the pimple area (and dry it of course) and then place one of those yellow patches on (depending on how big your pimples are) and leave it on for few hours and then Tadaa! The pimple is gone, or at leas smaller and way less gross as it used to be before applying it.

Full review: http://www.mykoreaobsession.com/2016/01/cosrx-acne-pimple-master-patch-review.html