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The educational health content on What To Expect is reviewed by our team of experts to be up-to-date and in line with the latest evidence-based medical information and accepted health guidelines, including the medically reviewed What to Expect books by Heidi Murkoff. This site complies with the HONcode standard for trustworthy health information. This educational content is not medical or diagnostic advice. Use of this site is subject to our terms of use and privacy policy. © 2019 Everyday Health, Inc
In 2015, acne was estimated to affect 633 million people globally, making it the 8th most common disease worldwide.[9][18] Acne commonly occurs in adolescence and affects an estimated 80–90% of teenagers in the Western world.[19][20][21] Lower rates are reported in some rural societies.[21][22] Children and adults may also be affected before and after puberty.[23] Although acne becomes less common in adulthood, it persists in nearly half of affected people into their twenties and thirties and a smaller group continue to have difficulties into their forties.[2]

Scientists initially hypothesized that acne represented a disease of the skin's hair follicle, and occurred due to blockage of the pore by sebum. During the 1880s, bacteria were observed by microscopy in skin samples affected by acne and were regarded as the causal agents of comedones, sebum production, and ultimately acne.[163] During the mid-twentieth century, dermatologists realized that no single hypothesized factor (sebum, bacteria, or excess keratin) could completely explain the disease.[163] This led to the current understanding that acne could be explained by a sequence of related events, beginning with blockage of the skin follicle by excessive dead skin cells, followed by bacterial invasion of the hair follicle pore, changes in sebum production, and inflammation.[163]

And though none of the experts we spoke to specifically called this out, writer Frankie May Wong declared this salicylic-acid-enhanced Medik8 gel as her cystic-acne Holy Grail. She uses it sparingly to avoid it losing its efficacy, but thanks its blend of acne-fighting ingredients for her clear skin and the lack of scarring thereafter: “Another reason the Beta Gel seemed to work miracles could’ve been the combination of dioic acid (a rarer ingredient that otherwise only appears in the pricey but raved-about SkinCeuticals Blemish + Age Defense serum), azelaic acid, and niacinamide.”
Does your infant have more pimples than an eighth-grader? Just when she seems ready for her close-up — head rounding out nicely, eyes less puffy and squinty — baby acne might be next. This pimply preview of puberty is incredibly common, usually beginning at 2 to 3 weeks of age and affecting about 40 percent of all newborns. Fortunately it’s temporary, and it doesn’t bother your baby a bit. Here’s what to do in the meantime.

Some people use natural treatments like tea tree oil (works like benzoyl peroxide, but slower) or alpha hydroxy acids (remove dead skin and unclog pores) for their acne care. Not much is known about how well many of these treatments work and their long-term safety. Many natural ingredients are added to acne lotions and creams. Talk to your doctor to see if they’re right for you.


Postinflammatory hyperpigmentation (PIH) is usually the result of nodular acne lesions. These lesions often leave behind an inflamed darkened mark after the original acne lesion has resolved. This inflammation stimulates specialized pigment-producing skin cells (known as melanocytes) to produce more melanin pigment which leads to the skin's darkened appearance.[35] People with darker skin color are more frequently affected by this condition.[36] Pigmented scar is a common term used for PIH, but is misleading as it suggests the color change is permanent. Often, PIH can be prevented by avoiding any aggravation of the nodule, and can fade with time. However, untreated PIH can last for months, years, or even be permanent if deeper layers of skin are affected.[37] Even minimal skin exposure to the sun's ultraviolet rays can sustain hyperpigmentation.[35] Daily use of SPF 15 or higher sunscreen can minimize such a risk.[37]


Blackheads are a mild form of acne that appear as unsightly, open pores that look darker than the skin surrounding them. They get their dark appearance from a skin pigment called melanin, which oxidizes and turns black when it's exposed to the air. Blackheads aren't caused by dirt, but by sebum (oil) and dead skin cells blocking the pore. If the pore remains open, it becomes a blackhead; if it's completely blocked and closed, it turns into a whitehead.
Exercise regularly. Exercising does a number of things to help reduce your acne. It releases endorphins which lower stress levels and therefore reduce oil-production and also makes you sweat which cleans out dead skin cells. Try exercising on a daily basis for a minimum of thirty minutes to help reduce your acne not only on your face, but also on your chest, shoulders, and back; which is where the term "bacne" comes from.
The relationship between diet and acne is unclear, as there is no high-quality evidence that establishes any definitive link between them.[52] High-glycemic-load diets have been found to have different degrees of effect on acne severity.[7][53][54] Multiple randomized controlled trials and nonrandomized studies have found a lower-glycemic-load diet to be effective in reducing acne.[53] There is weak observational evidence suggesting that dairy milk consumption is positively associated with a higher frequency and severity of acne.[51][52][53][55][56] Milk contains whey protein and hormones such as bovine IGF-1 and precursors of dihydrotestosterone.[53] These components are hypothesized to promote the effects of insulin and IGF-1 and thereby increase the production of androgen hormones, sebum, and promote the formation of comedones.[53] Available evidence does not support a link between eating chocolate or salt and acne severity.[52][55] Chocolate does contain varying amounts of sugar, which can lead to a high glycemic load, and it can be made with or without milk. Few studies have examined the relationship between obesity and acne.[2] Vitamin B12 may trigger skin outbreaks similar to acne (acneiform eruptions), or worsen existing acne, when taken in doses exceeding the recommended daily intake.[57] Eating greasy foods does not increase acne nor make it worse.[58][59]
Contrary to popular belief, acne isn't caused by a harmful diet, poor hygiene, or an uncontrolled sex drive. The simple truth is that heredity and hormones are behind most forms of acne. Swearing off chocolate or scrubbing your face 10 times a day won't change your predisposition to this unsightly, sometimes painful, and often embarrassing skin problem.

C. acnes also provokes skin inflammation by altering the fatty composition of oily sebum.[45] Oxidation of the lipid squalene by C. acnes is of particular importance. Squalene oxidation activates NF-κB (a protein complex) and consequently increases IL-1α levels.[45] Additionally, squalene oxidation leads to increased activity of the 5-lipoxygenase enzyme responsible for conversion of arachidonic acid to leukotriene B4 (LTB4).[45] LTB4 promotes skin inflammation by acting on the peroxisome proliferator-activated receptor alpha (PPARα) protein.[45] PPARα increases activity of activator protein 1 (AP-1) and NF-κB, thereby leading to the recruitment of inflammatory T cells.[45] The inflammatory properties of C. acnes can be further explained by the bacterium's ability to convert sebum triglycerides to pro-inflammatory free fatty acids via secretion of the enzyme lipase.[45] These free fatty acids spur production of cathelicidin, HBD1, and HBD2, thus leading to further inflammation.[45]
What's Going On: If it's big, red, and painful, you're probably experiencing cystic acne, one of the more severe types. "Cystic pimples are caused by genetics and hormonal stimulation of oil glands," says Zeichner. Not only are they large, but they're also notoriously tough to treat. They often recur in the same place, because even if you manage to get rid of one, it can keep filling up with oil again and again, like an immortal pimple.
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.
Popping pimples seems to be the quickest way to make the red spots on our skin disappear. But it can permanently damage your skin! When you squeeze a pimple, you’re actually forcing the oil substance and dead skin cells deeper into the follicle. The extra pressure exerted will make the follicle wall rupture, and spill the infected materials into the innermost part of our skin. This skin damage will lead to the loss of tissue, and finally cause acne scars.[2]
The educational health content on What To Expect is reviewed by our team of experts to be up-to-date and in line with the latest evidence-based medical information and accepted health guidelines, including the medically reviewed What to Expect books by Heidi Murkoff. This site complies with the HONcode standard for trustworthy health information. This educational content is not medical or diagnostic advice. Use of this site is subject to our terms of use and privacy policy. © 2019 Everyday Health, Inc
Decreased levels of retinoic acid in the skin may contribute to comedo formation. To address this deficiency, methods to increase the skin's production of retinoid acid are being explored.[10] A vaccine against inflammatory acne has shown promising results in mice and humans.[50][180] Some have voiced concerns about creating a vaccine designed to neutralize a stable community of normal skin bacteria that is known to protect the skin from colonization by more harmful microorganisms.[181]
Similar to the above natural acne remedies, these acne treatments can be inexpensive and worth giving a try. Best of all, these use products you probably already have in your household, like apple cider vinegar and toothpaste. Use home remedies for acne with caution if you have cystic acne, open sores or inflammatory acne, which are best treated with medical supervision.
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Blackheads are a mild form of acne that appear as unsightly, open pores that look darker than the skin surrounding them. They get their dark appearance from a skin pigment called melanin, which oxidizes and turns black when it's exposed to the air. Blackheads aren't caused by dirt, but by sebum (oil) and dead skin cells blocking the pore. If the pore remains open, it becomes a blackhead; if it's completely blocked and closed, it turns into a whitehead.

This at-home skin peel available at Sephora tightens pores, reduces oil, helps retexturize skin and diminishes dark spots. It's paraben and sulfate free, non-comedogenic and isn't tested on animals. Use this peel each week as part of your clear skin regimen to help even out skin tone and gently remove unhealthy top skin layers, revealing new, healthier skin underneath. 
Everything you need to know about blackheads Blackheads are small lesions that often appear on the face or neck. They are a feature of mild acne, and handling blackheads in the right way can help to prevent the acne from becoming more severe. We look at ways to reduce and treat breakouts. Learn more about what causes blackheads and how to get rid of them here. Read now
Side effects include increased skin photosensitivity, dryness, redness and occasional peeling.[80] Sunscreen use is often advised during treatment, to prevent sunburn. Lower concentrations of benzoyl peroxide are just as effective as higher concentrations in treating acne but are associated with fewer side effects.[79][81] Unlike antibiotics, benzoyl peroxide does not appear to generate bacterial antibiotic resistance.[80]
Shah often recommends over-the-counter retinols or prescription retinoids to her acne-prone patients. “I find that compared to other treatments they are beneficial for not just treating acne but also preventing new acne from forming as they help prevent that initial stage of the follicle getting clogged,” she says. “They can also help with some of the post acne [problems] such as hyperpigmentation.” But keep in mind if you have sensitive skin (or eczema or rosacea), a prescription retinoid might be too strong an option. However, your dermatologist can recommend an over-the-counter retinol with a low concentration (0.1 to 0.25 percent), which might be better tolerated. Retinol also isn’t a quick fix. It takes time to see results, and it’s something you’ll have to keep using to maintain its benefits. Shah also mentions that retinol plays well with other acne treatments on the list. "Retinol can be combined with other over-the-counter or prescription medications such as benzoyl peroxide, topical antibiotics, and oral medications. The right combination depends on the severity of the acne and your skin type."
You've probably seen the Proactiv clear skin system advertised on television at some point over the last several years, but does it work? Proactiv is one of the better acne remedies out there for mild cases of inflammatory and noninflammatory acne, hormonal acne and adult acne. The starter kit comes with a gentle benzoyl peroxide exfoliating cleanser, a glycolic acid pore cleanser, and a benzoyl peroxide repairing treatment.
Below is a summary of the categories of data that we process, the purposes of processing the data and on what legal basis we are processing your data. Our processing of your personal data partly depends on whether you have subscribed for membership with us or not. The processing of personal data relating to customers that are not members is described in section 3.2 below. The processing of our members’ personal data is described in section 3.3 below.
“You unfortunately cannot determine the strength of a product strictly by the percentage of its active ingredients because how well a product works depends on how well its inactive ingredients help it penetrate the skin,” explains Dr. Green. “In other words, a 2 percent benzoyl peroxide may be more effective than another brand’s 5 percent benzoyl peroxide because there are other ingredients helping out.”
Acne vulgaris and its resultant scars have been associated with significant social and academic difficulties that can last into adulthood, including difficulties obtaining employment.[31][177] Until the 1930s, it was largely seen as a trivial problem among middle-class girls – a trivial problem, because, unlike smallpox and tuberculosis, no one died from it, and a feminine problem, because boys were much less likely to seek medical assistance for it.[165] During the Great Depression, dermatologists discovered that young men with acne had difficulty obtaining jobs, and during World War II, some soldiers in tropical climates developed such severe and widespread tropical acne on their bodies that they were declared medically unfit for duty.[165]
Like baby acne, eczema is very common in newborns, but it’s usually caused by dry (not oily) skin. Mild eczema can cause lots of small bumps, similar to baby acne. Since it often starts on the cheeks, it’s easy to confuse with baby acne. But, if it spreads into a rash that covers the skin or develops in other areas of your baby’s body, such as the folds of his elbows and knees, then it’s probably eczema, not acne. Eczema isn’t usually serious. You can treat it by using a gentle hydrating lotion on your baby’s skin after bathtime.
Fractional laser treatment is less invasive than ablative laser treatment, as it targets only a fraction of the skin at a time. Fractional lasers penetrate the top skin layers, where its light energy stimulates collagen production and resurfaces the top layer of the epidermis. Treatments typically last between 15 and 45 minutes and effects become visible in 1 to 3 weeks.
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. Aesthetician and Rodan + Fields Consultant, Jessica 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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This at-home skin peel available at Sephora tightens pores, reduces oil, helps retexturize skin and diminishes dark spots. It's paraben and sulfate free, non-comedogenic and isn't tested on animals. Use this peel each week as part of your clear skin regimen to help even out skin tone and gently remove unhealthy top skin layers, revealing new, healthier skin underneath. 
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