Ever since about 6th grade (when I was 10- I'm not 18) I have had severe acne. I would hate to get my pictures taken, even make up wouldn't hide it so I just wore baggy clothes, hoodies, always kept my hair in my fae, or out of my face, thinking my hair was causing my acne. I tried every sort of medicated cream and nothing was working.
It was really harsh on my self esteem and I would hide behind outlandish clothes, or just avoid people all-together! I have recently been looking up videos on YouTube. I found this video and it's very helpful! It's 15 minutes long, but I highly suggest that you watch all 15 minutes of it because it is very helpful and I actually have seen a difference.
Of course everyone is different, and this won't cure you of everything, but it definitely is a unique view of skin care. I also suggest you follow this girl on YouTube and check out her other videos because she does many many skin are tips and tricks that are very helpful!