When whiteheads and blackheads become infected with bacteria, called Propionibacterium acnes, it leads to inflammatory acne. Regular bacteria is found in most whiteheads and blackheads, but P. acnes is attracted to the closed, oily environment. This bacteria makes acne more difficult to treat. The four different pimple types that characterize inflammatory acne are papules, pustules, nodules and cysts.
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 approach to acne treatment underwent significant changes during the twentieth century. Retinoids were introduced as a medical treatment for acne in 1943.[83] Benzoyl peroxide was first proposed as a treatment in 1958 and has been routinely used for this purpose since the 1960s.[167] Acne treatment was modified in the 1950s with the introduction of oral tetracycline antibiotics (such as minocycline). These reinforced the idea amongst dermatologists that bacterial growth on the skin plays an important role in causing acne.[163] Subsequently, in the 1970s tretinoin (original trade name Retin A) was found to be an effective treatment.[168] The development of oral isotretinoin (sold as Accutane and Roaccutane) followed in 1980.[169] After its introduction in the United States it was recognized as a medication highly likely to cause birth defects if taken during pregnancy. In the United States, more than 2,000 women became pregnant while taking isotretinoin between 1982 and 2003, with most pregnancies ending in abortion or miscarriage. About 160 babies were born with birth defects.[170][171]
All the dermatologists we talked to agreed that there is no one-size-fits-all solution to acne. Every patient responds to treatments differently, and sometimes it can get worse before it gets better. But with the help of your dermatologist, you can find an acne treatment regimen that works for you. And, yes, we do stress how helpful it is to work with a derm to get it right.

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Dermal or subcutaneous fillers are substances injected into the skin to improve the appearance of acne scars. Fillers are used to increase natural collagen production in the skin and to increase skin volume and decrease the depth of acne scars.[145] Examples of fillers used for this purpose include hyaluronic acid; poly(methyl methacrylate) microspheres with collagen; human and bovine collagen derivatives, and fat harvested from the person's own body (autologous fat transfer).[145]

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If you’re used to seeing advertisements for acne treatments using five or six different products to clear up blemishes, you might be surprised that a simple three-step kit is our top pick. In fact, we favored Paula’s Choice for its simplicity. This twice-daily, three-step kit — which includes a cleanser, an anti-redness exfoliant, and a leave-on treatment — is concise without cutting corners.
Although some people think they can get the best acne treatment by mixing and matching products, this is not the recommended method of treating blemishes. Aside from doctors, few people understand how different products can react with each other. In some cases, combining two products increases how well both work. For example, green tea extract and salicylic acid complement each other. Skin care system makers usually hire doctors to help improve the effectiveness of their systems.
What it does: Benzoyl peroxide is the only known substance which can bring oxygen under the skin surface. Since bacteria cannot survive in the presence of oxygen, when used in an adequate dosage, benzoyl peroxide eradicates 99.9% of these bacteria almost immediately. It also exerts a mild drying and peeling effect, which is thought to help prevent breakouts.1-6 Benzoyl peroxide also helps lessen inflammation.7-9 2.5% benzoyl peroxide is just as effective as higher concentrations with less side effects.6,10
Acne doesn’t discriminate based on age, race or gender. Between 40-50 million Americans have acne and know the daily struggle of living with this painful skin condition. 20% of them are adults. The other 80% are young people between the ages of 12 and 24, and one-quarter of these young people will suffer permanent scars on their skin from it. That means that 10 million young people will have permanent acne scarring.
There are two big guns used to take down acne, and they're both great at doing entirely different things. Salicylic acid is a beta hydroxy acid that comes from willow bark and works primarily as an exfoliator, breaking down fatty acids like sebum so your pores don’t clog. (Glycolic acid works similarly but is less effective.) These acids do their thing on comedones — whiteheads, blackheads, and other non-red bumps.
Genetics can also affect how your immune system works. When confronted with bacteria, your skin might erupt in painful red lumps called pustules while someone else might just get a blackhead. Or maybe your friend has sensitive skin that breaks out more often than yours does. Your family history has a lot to do with the type of skin you have and how it looks and feels.
Perhaps one of the most popular cleansers for combination skin care on the market today, Boscia's purifying cleansing gel works best for oily to normal skin types. It works by gently cleansing skin without stripping it and adding harsh elements to the skin. It can be a tad drying, so it works best on women with more oily spots than dry spots. You can also use it to cleanse your oily T-zone, but keep it away from your dry spots, where you may want to moisturize more.
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The Body Shop Tea Tree Oil Products: Even though it’s not made in a lab, tea tree oil has been studied and proven to be a powerful anti-acne agent. The Body Shop takes advantage of this ingredient with their full line of tea tree oil products, from pure oil to face wipes to a clay mask, all containing tea tree oil. These products are best for oily skin, pimples, and cystic acne.
Considerations: Benzoyl peroxide is able to produce complete clearing of acne only when used in an adequate dosage and within a properly applied benzoyl peroxide regimen. Some dryness, redness, and itchiness is to be expected in the first few weeks of use.6 Scientists call this initial period the "hardening effect" of benzoyl peroxide. About 1-3% of people are allergic to benzoyl peroxide and experience an inflammation of the skin or severe crusting.3This should not be confused with the "hardening effect" of benzoyl peroxide. Benzoyl peroxide, like any other peroxide, can bleach hair and fabric.1
Atrophic acne scars have lost collagen from the healing response and are the most common type of acne scar (account for approximately 75% of all acne scars).[31][32] They may be further classified as ice-pick scars, boxcar scars, and rolling scars.[30] Ice-pick scars are narrow (less than 2 mm across), deep scars that extend into the dermis.[31] Boxcar scars are round or ovoid indented scars with sharp borders and vary in size from 1.5–4 mm across.[31] Rolling scars are wider than icepick and boxcar scars (4–5 mm across) and have a wave-like pattern of depth in the skin.[31]

If you’re looking for a hormonal solution to your acne but don’t want to take a combined oral contraceptive, spironolactone may be the answer. This oral medication is a potassium-sparing diuretic originally designed to treat high blood pressure, but is now also used to treat acne. It mainly functions by reducing sebum production, leading to less acne formation13. If you are able to get pregnant, you don’t necessarily need to take a combined oral contraceptive, but you will want to use some form of birth control since spironolactone, like Accutane, is a well-known teratogen and is known for causing birth defects.
Acne appears when a pore in our skin clogs. This clog begins with dead skin cells. Normally, dead skin cells rise to surface of the pore, and the body sheds the cells. When the body starts to make lots of sebum (see-bum), oil that keeps our skin from drying out, the dead skin cells can stick together inside the pore. Instead of rising to the surface, the cells become trapped inside the pore.
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