I have been using it for 5-6 years on blemishes and pimples, and within 12-24 hours they dry up and close, without exaggeration. Maybe it works well with my skin. I apply it before my moisturizer at night, and in the morning I only have a mark where the pimple used to be. It is known that tea tree oil has antiseptic and soothing properties, I don't know why it has such bad reviews. In my opinion, it is a treasure, especially if you have combination-oily skin prone to acne. 4 stars only because it dries out the area where you apply it (which is natural in the end)