Really bad acne along shoulders and all over back.

I've been getting really bad spots on my shoulders and all over my back... Do you know what's causing this? Do you know any ways to control this break out?

Actually now that I think about it the spots on my face are worse as well..

I haven't changed anything in my normal routine, like I still use the same body wash and shampoo as I have for the past 3 years.. So it can't be that, right?

I also haven't changed my diet. I don't eat chocolate at all and I can't eat dairy products so its not that.

Thanks for any advice.
Really bad acne along shoulders and all over back.
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