I always keep these handy, especially when traveling. They're so thin and discreet you can put them over pimples or even just red spots. If you do it overnight to a whitehead the next day it's literally gone, and you can see all the gunk of the whitehead left on the patch. If you do it over a more complicated pimple it seems to reduce the size of it by around 50%? I then put a new one on in the morning so I can apply make-up over it. They're perfect for open pimples too because it protects it from "re-infecting", this will definitely be a skincare lifer for me.