No matter what, even if you somehow get rid of the acne, it will likely to come back at some point. There is honestly no 'true solution' to acne. Stress plays a role in acne, oil causes acne, puberty causes acne. You don't necessarily have to be a teen to have acne, since some people can live with it until they are older. I definitely do not suggest trying Proactive or any of those big brand names, since it really does not work (well, it depends on the type of person you are).
You've probably heard that vinegar works magically with any situation, which I would suggest trying to put vinegar on your face. Also, I am not suggesting this or anything, but if you are a girl, I've seen significant decrease in acne if you are on a birth control pill. Believe it or not, nowadays teens are getting on the pill just to control their acne.
If neither of that interests you, I would suggest this over the rest of the options listed. This worked for me, and I can be honest, I had really bad acne a few years ago and this helped a lot. I mean, it's not completely gone, but there is such an improvement. If you're up for the good ol' "let me go out and buy something", try "Dickinson's Witch Hazel". That will help get rid of the oil on your skin. After putting that on and letting it dry, then put on some "Terminator 10". If you don't know what that is, it's an acne treatment medicine. You can easily buy it in a beauty store or even a convenient store. Although, if you are sensitive to benzoyl peroxide, you shouldn't use it.
The reason the student is reading. :)
