The cure for acne? that old fable.
I can only offer my own experience, which may or may not help others.
I am now 32, so my acne is not like it was when I was a teen. At least for this year so far, I had forgotten what it is like to 'suffer' acne.
This helped play it's part
https://www.amazon.co.uk/gp/product/B0009DSNUW
But I haven't used it recently and since the beginning of this year I changed my diet, no pasta, no white potato, no white rice, no processed foods. Everything cooked from scratch.
I've got quite the sweet tooth, I love to have a large bag of pic a mix at the cinema, but I've lost over a stone in weight since New Year - so just over a month ago, I don't want to ruin that.
So the pic a mix at the cinema, had to be a 'rare' treat - which I've had twice recently (oops). The morning after this large intake of sugar I get a pimple, on both occasions. I declare a pattern emerging..
Something like this was never so 'obvious' to me before, perhaps because my diet wasn't clean enough to see a pattern. Research on the internet was never conclusive as to 'the' cause, I probably never wanted to admit sugar or probably alcohol was the cause of acne for me since I didn't want to give them up.
So if you suffer acne, and I know it might seem like a lot of effort but a clean diet could really work.