Buy a bottle of aspirin, and some Aloe vera gel. Any brand should do(I usually use whatever's the cheapest, so I assume any is fine lol). Crush the aspirin tablets until you're left with nothing but powder, and mix with a lil bit of the gel. Apply on the areas affected, and it usually stops the blemishes from getting any worse. They're usually less visible in a couple of days or so. It might depend on your skin type though, not sure but hope this helps :)