Firstly, don't keep touching it, this is vital.
Bathe face as often as possible, good and hot.
Change your diet; experiment with the changes...baked tud instead of chips.
If you can lay hands on decolorized iodine, use this on local inflamed areas. Failing this, use surgical spirit.
There is an antibiotic course that is used in severe cases, but it is given long term, and I gather there are many good reasons why you should avoid this if possible.
A confident and cheerful personality ( however contrived ) will hide this tedious teenage + problem more than anything else you can do.