I used to use tea tree oil and rosemary oil and other eos. They always helped but never made a big difference. Right now I dissolve aspirin in withchazel, mix it with honey, put it on and leave it. (If skin is acne-prone you can also put it on clear skin preventatively.) I would recommend dissolving an uncoated aspirin (or generic) in witchazel (you can use water just as well but witchazel gives even more anti-inflammatory properties to the mix) dabbing it on as a paste, and leaving it on until it starts to dry, then just rinsing it off. If you add a bit of honey it'll stick even better and you'll get the anti-microbial and moisturizing effects of honey as well.
I wish I'd known about these possibilities when I started with skin problems, could have saved a lot of trouble!