A major mechanism of acne-related skin inflammation is mediated by P. acnes's ability to bind and activate a class of immune system receptors known as toll-like receptors (TLRs), especially TLR2 and TLR4.[44][64][65] Activation of TLR2 and TLR4 by P. acnes leads to increased secretion of IL-1α, IL-8, and TNF-α.[44] Release of these inflammatory signals attracts various immune cells to the hair follicle including neutrophils, macrophages, and Th1 cells.[44] IL-1α stimulates increased skin cell activity and reproduction, which in turn fuels comedo development.[44] Furthermore, sebaceous gland cells produce more antimicrobial peptides, such as HBD1 and HBD2, in response to binding of TLR2 and TLR4.[44]


The other downside to Proactiv+ is that the bottles are small — like, half the size of Paula’s Choice small. Combine that with its recommended two or three-times daily application, and you’re going to be going through a lot of kits, which ultimately means spending more money on your treatment. If Proactiv is the only thing that works for you, it may very well be worth the investment, but we recommend starting with Paula’s Choice to see if you can get the same results at a cheaper price.


PanOxyl Acne Foaming Wash: This product is marketed for facial acne, but we recommend using on pesky body acne instead. PanOxyl uses benzoyl peroxide, a highly effective acne-fighting ingredient that we’ll describe more just below, but at a concentration that is much too high to be used on your face. Most PanOxyl products contain 10% benzoyl peroxide, which will likely cause peeling and burning on your face, but could be the perfect solution for back or butt acne.

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]
Acrokeratosis paraneoplastica of Bazex Acroosteolysis Bubble hair deformity Disseminate and recurrent infundibulofolliculitis Erosive pustular dermatitis of the scalp Erythromelanosis follicularis faciei et colli Hair casts Hair follicle nevus Intermittent hair–follicle dystrophy Keratosis pilaris atropicans Kinking hair Koenen's tumor Lichen planopilaris Lichen spinulosus Loose anagen syndrome Menkes kinky hair syndrome Monilethrix Parakeratosis pustulosa Pili (Pili annulati Pili bifurcati Pili multigemini Pili pseudoannulati Pili torti) Pityriasis amiantacea Plica neuropathica Poliosis Rubinstein–Taybi syndrome Setleis syndrome Traumatic anserine folliculosis Trichomegaly Trichomycosis axillaris Trichorrhexis (Trichorrhexis invaginata Trichorrhexis nodosa) Trichostasis spinulosa Uncombable hair syndrome Wooly hair Wooly hair nevus
Every expert we spoke with said the most critical part of combating acne is combating it every day. “The only way to make any medication work is to use it on a daily basis,” says Dr. Green. Fitz Patrick emphasizes that it really comes down to what you can maintain for the long term: “Kits are great because they take out all the guesswork -- you just follow the instructions. But if four steps is going to be too many for you to keep up week after week, you’ll be better off finding one that has fewer treatments.”
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