No, seriously. I am 100% in love with CosRX because of this thing. I've always have a problem with hormonal acne, and it always seems to persist for a good 2-3 weeks even with the help of topical acne stuff from the drugstore. I've dabbed a little of this directly onto the spot morning and night and problem spots go away in a week, AT MOST. Sometimes even a couple days!!! With cystic acne though, I find the A-Sol most effective if you dab it on, wait for it to dry completely, then stick a hydrocolloid bandage on it. This is really a game-changer in my routine, all I have to say that is for me, it doesn't reduce redness THAT much. Only a little. I absolutely would buy this again as soon as mine is getting low.