Although I've never had awful acne, I do suffer from occasional breakouts, usually associated with PMS.
Because of the frequent breakouts, I used to keep acne cream on hand.
After reading up on natural remedies, I noticed tea tree oil kept coming up in magazines and books as a very effective treatment for acne. So I decided to give it a try.
So far, I've been impressed. You can use the essential oil straight up, or combine it with other things to make it a bit less powerful. I use it straight up. I put it on a cotton ball and apply it wherever I need it. Actually, I've begun using it once a day in the spots I know I have trouble, to see if I can ward off breakouts before they happen. I'll let you know if it works.
I will say that this stuff is fairly odiferous. I don't mind the smell- it's sort of piney. But some folks might not like it.