I'm often asked if I can treat acne in one day. Obviously if you only have one spot of a pimple, sure that can be treated in one day with the spot treatment. However, most people have acne which persists over the course of several years. Treating it on a daily basis, trying to prevent future breakouts is very important. I like salicylic acid as an ingredient to be applied to the skin on a regular basis which may help a) reduce acne and b) prevent future breakouts.