Acne scars are caused by inflammation within the dermal layer of skin and are estimated to affect 95% of people with acne vulgaris.[31] The scar is created by abnormal healing following this dermal inflammation.[32] Scarring is most likely to take place with severe acne, but may occur with any form of acne vulgaris.[31] Acne scars are classified based on whether the abnormal healing response following dermal inflammation leads to excess collagen deposition or loss at the site of the acne lesion.[33]
Benzoyl peroxide attacks the P. acnes bacteria. However, one of its main side effects is dryness: If you’re going to use anything with benzoyl peroxide, make sure to moisturize afterwards. Sulfur and azelaic acid are less common and less severe alternatives to benzoyl peroxide. Dr. Peter Lio, assistant professor of clinical dermatology at Northwestern University, says sulfur-based treatments are “a good fit for patients who can’t tolerate the side effects of benzoyl peroxide.”
What's Going On: You might be all too familiar with these, which tend to make their debut when you’re in high school. "Blackheads, like whiteheads, are blocked pores," says Zeichner. What gives them their namesake color, though, is the oil. It's already dark, but blackheads also have a larger opening at the surface than whiteheads do, meaning air can enter and oxidize that oil sitting inside the pore, turning it even darker.

But Accutane has mixed reviews for a reason. It makes the skin super dry and sensitive, which means it’s important to keep moisturizers and lip balm nearby while you’re on the treatment. Oh, and don’t even think about waxing your eyebrows (just imagine your skin ripping off). There’s another downside to Accutane: It requires a lot of paperwork and office visits. Since isotretinoin can cause birth defects, you have to come into the dermatologist once a month to get a pregnancy test and take a lengthy survey with embarrassing questions about your sex life to prove that you are using sufficient birth control. These precautions are intense, but dermatologists agree that the final results for Accutane are like no other. “This is one of the few medicines that I can look [patients] in the eye and guarantee them it will work,” says Friedman.
Hydrated skin provides the right moisture and balance the skin needs to thrive. Additionally, water helps flush out toxins, something we need on a daily basis. And those omega-3s are pretty awesome at providing a reduction in inflammation. Wild-caught salmon is one of my favorite sources, in addition to sardines, walnuts, flaxseed oil and almonds. (10)
From the What to Expect editorial team and Heidi Murkoff, author of What to Expect the First Year. Health information on this site is based on peer-reviewed medical journals and highly respected health organizations and institutions including ACOG (American College of Obstetricians and Gynecologists), CDC (Centers for Disease Control and Prevention) and AAP (American Academy of Pediatrics), as well as the What to Expect books by Heidi Murkoff.

If one partner likes bringing devices to bed and the other partner doesn’t, there’s very little compromise to be found. Science is pretty unanimous on the fact that screens can cause harm to a healthy sleeper. Both partners should agree on a time to keep technology out of the bedroom or turn screens off. This will prevent both partners from having their sleep interrupted and can help you power down after a long day.
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.
Benzoyl peroxide is an antibacterial ingredient, and it’s very effective at killing the P. acnes bacteria that causes breakouts. But benzoyl isn’t without its downsides. The leave-on creams and cleansing treatments can dry out sensitive skin types and bleach clothing if you aren’t careful. Board-certified dermatologist Eric Meinhardt, M.D., previously told SELF that it's best to stick to formulations that have no more than 2 percent of benzoyl peroxide listed on the active ingredients chart; stronger concentrations are harder on your skin without being any tougher on bacteria.

Exercise not only helps you with fitness, but it can help reduce acne-prone skin irritations. That’s right, add its use on how to get rid of pimples to the list of exercise benefits. Exercise offers stress relief while getting the blood circulating. This blood-pumping activity sends oxygen to your skin cells, which helps remove dead cells from the body.
Benzoyl peroxide attacks the P. acnes bacteria. However, one of its main side effects is dryness: If you’re going to use anything with benzoyl peroxide, make sure to moisturize afterwards. Sulfur and azelaic acid are less common and less severe alternatives to benzoyl peroxide. Dr. Peter Lio, assistant professor of clinical dermatology at Northwestern University, says sulfur-based treatments are “a good fit for patients who can’t tolerate the side effects of benzoyl peroxide.”
“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.”
Alternative and integrative medicine approaches used in the treatment of acne include fish oil, brewer's yeast, probiotics, oral zinc and topical tea tree oil. More research is needed to establish the potential effectiveness and long-term safety of these and other integrative approaches, such as biofeedback and traditional Chinese medicine. Talk with your doctor about the pros and cons of specific treatments before you try them.
The Anti-Redness Exfoliating Solution is mostly water, but its 2 percent salicylic acid is enough to eat through oil and remove the dead skin cells clogging your pores — and it boasts a higher concentration than nearly every other kit we looked at. Sodium hyaluronate, the super-moisturizing humectant we fell in love with in our review on the Best Face Moisturizer, also caught our eye sitting smack dab in the middle of the ingredients list.
Another once-daily gel your dermatologist might prescribe for acne is Aczone 7.5 percent. The active ingredient, dapsone, is both antimicrobial and anti-inflammatory, and it’s proven to help with blackheads, whiteheads, and deeper painful pimples. Oftentimes, Aczone is used alongside other acne treatments. And like many of those other remedies, Aczone can cause skin to dry out.
Kathyrn Bowling’s son Gus was only two weeks old when she first noticed red bumps spreading on his face: newborn acne. At the time, the Atlanta mom wasn’t concerned about something so common (and harmless) as baby acne. I was worried about so many other things, like how much he was eating and whether I would get enough sleep,” she says. “In the grand scheme of things, a few bumps on his face didn’t seem too bad.”
When we sleep, healing happens, and at the same time, it’s a great time to apply a home remedy and let it get it to work on eliminating toxins that can cause acne. The Psychiatric Clinics of North America reports that stress is a factor affecting all organs. Though it’s easy to forget, the skin is an organ. In fact, it’s your largest organ! Getting plenty of rest can help reduce acne-associated stress. (9) 
Cystic Acne: The most severe type of acne, cystic acne requires dermatological care and prescription acne medication to treat. Even the best acne products available over the counter are no match for this painful condition in which the area of the outbreak becomes inflamed, but not infected. Cystic acne can result in permanent scarring. However, it's important to know that all acne lesions can scar. Scarring is related to size, amount of inflammation, genetics and delay in therapy.
The verdict on smoking and its relationship to acne is still undecided. The evidence goes back and forth; while many studies seem to prove this theory, other studies contradict such research. For example, research published in 2001 by the British Journal of Dermatology concluded that out of 896 participants, smokers tended to have more acne in general; the more they smoked, the worse their acne felt and appeared. Confusingly, a study published just five years later in the Journal of Investigative Dermatology offered opposing research; nurses interviewed over 27,000 men within a span of 20 years and found that active smokers showed significantly lower severe than non-smokers. Although smoking’s relationship with acne vulgaris is undetermined, smoking has proven effects on acne inversa. It also disrupts hormonal balance, lowers vitamin E levels (an essential antioxidant in skin), induces higher instances of psoriasis, decreases oxygen flow to skin cells, and slows the healing process of open sores. Acne aside, smoking promotes wrinkles and premature aging. Did we mention it’s also deadly? Kick this habit to the curb; your skin will thank you.

Hormonal fluctuations and an imbalance of estrogen and testosterone levels have proven to be a direct cause of acne. For this reason, many experience an onslaught of breakouts during puberty and pregnancy. The brain releases a GnRH hormone when an adolescent begins puberty, which in turn signals the pituitary gland to release two additional androgens. Androgens make the sebaceous glands produce more sebum, causing it to occupy too much space within the pore and preventing the full expulsion of dead skin cells and debris. Fluctuations in hormones also cause many women to experience acne during pregnancy and a worsening of breakouts during menstrual cycles.
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.
We suggest avoiding spot treatments. “Benzoyl peroxide, when placed on red spots, can actually cause more irritation and inflammation to the area. It’s best used to prevent red bumps and pustules, and applied all over the area you want to treat,” said Townsend, who was also quick to naysay a spot-treat-only approach: “Acne affects all of the pores. If someone is going to spot treat against my advice, I still suggest they spot treat one day and treat the whole face the next.”
Chemical peels can be used to reduce the appearance of acne scars.[32] Mild peels include those using glycolic acid, lactic acid, salicylic acid, Jessner's solution, or a lower concentrations (20%) of trichloroacetic acid. These peels only affect the epidermal layer of the skin and can be useful in the treatment of superficial acne scars as well as skin pigmentation changes from inflammatory acne.[32] Higher concentrations of trichloroacetic acid (30–40%) are considered to be medium-strength peels and affect skin as deep as the papillary dermis.[32] Formulations of trichloroacetic acid concentrated to 50% or more are considered to be deep chemical peels.[32] Medium-strength and deep-strength chemical peels are more effective for deeper atrophic scars, but are more likely to cause side effects such as skin pigmentation changes, infection, and small white superficial cysts known as milia.[32]
Antibiotics. These work by killing excess skin bacteria and reducing redness. For the first few months of treatment, you may use both a retinoid and an antibiotic, with the antibiotic applied in the morning and the retinoid in the evening. The antibiotics are often combined with benzoyl peroxide to reduce the likelihood of developing antibiotic resistance. Examples include clindamycin with benzoyl peroxide (Benzaclin, Duac, Acanya) and erythromycin with benzoyl peroxide (Benzamycin). Topical antibiotics alone aren't recommended.
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