I've purchased the Cosrx A-Sol twice now, and I've noticed that it really helps stop pimples from forming. I use it in my trouble areas--I have an oily T-zone and dry cheeks, so I usually put this on my nose and some areas on my forehead where I see the most pimples. It has a high alcohol content, so DO NOT use this on your dry areas! I put this on after my toner, wait a while, and then moisturize. I notice that when I have a pimple forming (usually the area hurts a bit), the A-Sol helps it come to head faster or will even prevent it from forming at all. If you look at the ingredients, it definitely has a lot of healing/anti-inflammatory properties (propolis, tea tree oil, alcohol) so again, use it only on acne-prone areas! It looks like water, and there's a very mild medicinal scent.