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]
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Have you tried treating your acne with no luck? You might simply be using the wrong product for the type you have. Whether you have periodic breakouts or more stubborn cystic acne, there's a solution. We asked Dr. Neal Schultz, an NYC dermatologist, to share the best treatments for every type of acne. Read on for his expert product recommendations, along with some editor favorites, that'll give you clear skin in no time.
Believe it or not, as with adolescent acne, hormones are believed to be mainly to blame. In the case of newborns, however, it’s not their own hormones that are probably prompting the pimple problems, but Mom's — which are still circulating in baby's bloodstream as a holdover from pregnancy. These maternal hormones stimulate baby's sluggish oil-producing glands, causing pimples to pop up on the chin, forehead, eyelids and cheeks (and, sometimes, the head, neck, back and upper chest).

Risk factors for the development of acne, other than genetics, have not been conclusively identified. Possible secondary contributors include hormones, infections, diet and stress. Studies investigating the impact of smoking on the incidence and severity of acne have been inconclusive.[2][38][39] Sunlight and cleanliness are not associated with acne.[14]
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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).


Coconut oil is all the rage, with uses ranging from hair conditioning to cooking. But some swear by it as a natural acne treatment. To use coconut oil as an acne treatment, you can include it as part of a healthy diet. The fatty acids like lauric acid and caprylic acid are metabolized into antibacterial agents in the body. Or, you can apply a very small amount and rub directly onto your skin after cleansing for an extra hydrating boost.


Warning: Sulfur smells like rotten eggs. But it is an effective ingredient at drying up pus-filled pimples and whiteheads (you’ve gotta take the good with the bad). It works by sucking up the oil. Sulfur is typically mixed with other active ingredients to get the most efficacy and fragrances to mask the strong scent. You can often find it in masks and spot treatments.
Light therapy is a treatment method that involves delivering certain specific wavelengths of light to an area of skin affected by acne. Both regular and laser light have been used. When regular light is used immediately following the application of a sensitizing substance to the skin such as aminolevulinic acid or methyl aminolevulinate, the treatment is referred to as photodynamic therapy (PDT).[10][129] PDT has the most supporting evidence of all light therapies.[78] Many different types of nonablative lasers (i.e., lasers that do not vaporize the top layer of the skin but rather induce a physiologic response in the skin from the light) have been used to treat acne, including those that use infrared wavelengths of light. Ablative lasers (such as CO2 and fractional types) have also been used to treat active acne and its scars. When ablative lasers are used, the treatment is often referred to as laser resurfacing because, as mentioned previously, the entire upper layers of the skin are vaporized.[140] Ablative lasers are associated with higher rates of adverse effects compared with nonablative lasers, with examples being postinflammatory hyperpigmentation, persistent facial redness, and persistent pain.[8][141][142] Physiologically, certain wavelengths of light, used with or without accompanying topical chemicals, are thought to kill bacteria and decrease the size and activity of the glands that produce sebum.[129] The evidence for light therapy as a treatment for acne is weak and inconclusive.[8][143] Disadvantages of light therapy can include its cost, the need for multiple visits, time required to complete the procedure(s), and pain associated with some of the treatment modalities.[10] Various light therapies appear to provide a short-term benefit, but data for long-term outcomes, and for outcomes in those with severe acne, are sparse;[144] it may have a role for individuals whose acne has been resistant to topical medications.[10] A 2016 meta-analysis was unable to conclude whether light therapies were more beneficial than placebo or no treatment, nor how long potential benefits lasted.[145] Typical side effects include skin peeling, temporary reddening of the skin, swelling, and postinflammatory hyperpigmentation.[10]

Spironolactone is an androgen blocker. It can be used to treat hormonal acne in women (only) by reducing the production of androgens (male hormones) in a woman's body, which can then reduce oil production in the skin. If you're wondering how to get rid of acne overnight, keep in mind that aldactone can take up to three months to start taking effect.
Scarring from severe cystic acne can have harmful effects on a person's self esteem, happiness and mental health. Thankfully, there are many different acne scar treatment options available, ranging from chemical peels and skin fillers to dermabrasion and laser resurfacing. According to the American Academy of Dermatology, these are all safe and effective acne scar treatment methods. However, Baldwin says it's important to first clarify what you mean by "scar." "Many people point to red or brown spots leftover from old zits and call them scars," she says. "These are marks, not scars and they'll fade with time. Scars have textural changes and are not flush with the surface of the skin. There are two types of acne scars—innies and outies. Outies can be injected with corticosteroids and flattened. Innies can be either deep and narrow or broad, sloping and relatively shallow. Deep and narrow scars need to be cut out, but broader sloping scars can be made better by fillers, laser resurfacing and dermabrasion."
Our favorite for banishing blemishes on the fly, Glossier's zit stick is not only effective, but it's portable. Just stash it in your purse for any unexpected breakouts! Packed with acne-fighting benzoyl peroxide, this convenient roll-on works extremely quickly. In a clinical trial, 83% of test subjects said that it lessened the appearance of pimples in just 3 hours. We've tried it ourselves and can confirm the 3-hour claim is true.

Tea tree oil is renowned for being good for your skin. In addition to this, it also contains anti-bacterial and anti-fungal properties, which makes it highly beneficial for acne treatment. In fact, studies that compare tea tree oil to the acne medication benzoyl peroxide shows it to be just as effective. But please remember to dilute tea tree oil before you use it; otherwise, your skin may get irritated.
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The Pore Targeting Treatment gel and Complexion Perfecting Hydrator moisturizer slip on nicely, with the former powered by skin-loving glycerin and the latter by a whole slew of delicious ingredients, like licorice root extract, sodium hyaluronate, bisabolol, and allantoin. The three-step solution is easy to use and makes cleansing the face a quick, efficient process.
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Temporary skin fillers have been used for years for acne scar treatment, but a permanent dermal filler was approved for use by the FDA only recently. Designed to remove moderate to severe acne scarring, Bellafill is made up of 80 percent collagen to replace lost volume and 20 percent polymethylmethacrylate, which helps your body heal by boosting protein production.
Inflammatory Acne: Inflammatory acne is red bumps and pustules, not whiteheads, blackheads and comedones. It doesn't necessarily start as them, either. It arises on its own. Whiteheads, blackheads or comedones that become inflamed can be painful and unsightly. Persistent inflammatory acne may require treatment by a physician or dermatologist, in addition to over-the-counter acne remedies.
The treatment regimen your doctor recommends depends on your age, the type and severity of your acne, and what you are willing to commit to. For example, you may need to wash and apply medications to the affected skin twice a day for several weeks. Often topical medications and drugs you take by mouth (oral medication) are used in combination. Pregnant women will not be able to use oral prescription medications for acne.
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