Here is an article from Wikihow describing the “Aspirin method” to reduce the redness and the size of new and old pimples. Worth reading.
from wikiHow – The How to Manual That You Can Edit

You went to bed with clear and glowing skin, but when you awaken, you find a huge, monster zit ready to take over your face! Hurry, get the aspirin! No, not to soothe the headache you’re getting from imagining how people will react when they see this mountain on your face. Aspirin is an anti-inflammatory, so you can put it right on the pimple to reduce redness and swelling.[1] Here’s how.
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Getting rid of acne oftentimes results in acne scars, making how to get rid of acne scars of equal concern to the persons affected by the condition. Getting rid of acne can be done in several ways. One of the methods is by medication with preparations like benzoyl peroxide, antibiotics, hormone-based treatments or dermatological soaps. Another way is to apply mechanical methods like laser treatments, phototherapy or dermabrasion.

But acne often leaves scars on the skin and there are various ways to get rid of acne scars. Acne scars are caused by the wound trying to heal itself, in the process producing too much collagen in one spot. There are different forms of acne scars, named after the shape of the scar. An “icepick scar” is the most common type of acne scar which causes a deep pit on the skin. A “box car scar” is found on the temple and cheeks. It may be superficial or deep and looks like the scar caused by chickenpox. A “rolling scar” is one that gives the skin what looks like waves. “Hypertrophic scars” are thick or “keloid” scars.

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