Benzoyl peroxide is one of the most popular acne medications available, and it works especially well for pimples because it kills the bacteria that causes them. It works by bringing oxygen under the skin, killing the particular type of bacteria associated with acne, known as p. acnes. P. acnes are anaerobic, meaning they can’t live where there is oxygen, so benzoyl peroxide is a great way to kill bacteria under the skin instantaneously1. This medication can often eradicate acne if used in the right dosage and in the right way.
If you have non-inflamed acne, it means you have a lot of blackheads and whiteheads, but not a lot of redness and swelling. Most common acne face washes can work well for you. If you have inflamed acne, you want to make sure you buy a facial cleanser that has the ingredients to reduce inflammation, swelling, and redness. But you also want to be careful not to buy or use anything that can cause irritation, dry skin and thus, more redness and swelling.
Hypertrophic scars are uncommon, and are characterized by increased collagen content after the abnormal healing response.[31] They are described as firm and raised from the skin.[31][33] Hypertrophic scars remain within the original margins of the wound, whereas keloid scars can form scar tissue outside of these borders.[31] Keloid scars from acne occur more often in men and people with darker skin, and usually occur on the trunk of the body.[31]

The Pore Normalizing Cleanser is designed just to cleanse, not treat, which is a good thing: The Nurse Practitioner study emphasizes the importance of washing with mild cleansers in conjunction with topical acne medications to combat or avoid excessive skin irritation. This one is water-based and fragrance-free, and uses sodium laureth sulfate (as opposed to its harsh cousin sodium lauryl sulfate) to eliminate any chance for irritation.
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Keep in mind that even if some products market themselves toward severe acne breakouts, all the kits we looked at are definitely designed for mild to moderate acne. Not sure if you fit on that scale? You’re not alone! When you’re in the middle of a breakout, all acne seems severe, so it can be difficult to self-diagnose your symptoms. We talked to dermatologists and cosmetic chemists to better understand the differences between the various types of acne (see below).
The predisposition to acne for specific individuals is likely explained by a genetic component, a theory which is supported by studies examining the rates of acne among twins and first-degree relatives.[2] Severe acne may be associated with XYY syndrome.[39] Acne susceptibility is likely due to the influence of multiple genes, as the disease does not follow a classic (Mendelian) inheritance pattern. Multiple gene candidates have been proposed including certain variations in tumor necrosis factor-alpha (TNF-alpha), IL-1 alpha, and CYP1A1 genes, among others.[18] Increased risk is associated with the 308 G/A single nucleotide polymorphism variation in the gene for TNF.[40]
Acne treatment that you apply to the skin: Most acne treatments are applied to the skin. Your dermatologist may call this topical treatment. There are many topical acne treatments. Some topicals help kill the bacteria. Others work on reducing the oil. The topical medicine may contain a retinoid, prescription-strength benzoyl peroxide, antibiotic, or even salicylic acid. Your dermatologist will determine what you need.
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