Spot treatments are designed to give problem pimples a mega-dose of concentrated benzoyl peroxide — in a couple of regimens, like the Proactiv Teen Kit, the spot treatment had nearly three times the benzoyl peroxide as its all-over treatment. The logic: If benzoyl peroxide can be irritating to the skin in high concentrations, limiting its intensity to just the pimple itself could save the rest of your healthy skin.
Inside your hair follicles, there are small glands producing oil called sebum. This oil mixes with skin cells in the follicle and joins them on the journey outward. But when there's too much sebum, too many dead skin cells or something on the surface that blocks their exit from the follicle, a blockage can occur. Bacteria joins the party, and the result is acne vulgaris, the most common form of acne.
A BHA product often cited includes salicylic acid, it must be between a pH between 3 and 4 to work. A BHA works to slough (to get rid of) off dead skin cells and encourage new skin growth. As a result, you may experience dry skin and scaliness around your acne, but this will dissipate over time as your skin begins to regenerate faster. Use this in a cleanser or spot treatment daily on the acne-affected areas of your skin.[6]
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.
Hydroquinone lightens the skin when applied topically by inhibiting tyrosinase, the enzyme responsible for converting the amino acid tyrosine to the skin pigment melanin, and is used to treat acne-associated postinflammatory hyperpigmentation.[35] By interfering with new production of melanin in the epidermis, hydroquinone leads to less hyperpigmentation as darkened skin cells are naturally shed over time.[35] Improvement in skin hyperpigmentation is typically seen within six months when used twice daily. Hydroquinone is ineffective for hyperpigmentation affecting deeper layers of skin such as the dermis.[35] The use of a sunscreen with SPF 15 or higher in the morning with reapplication every two hours is recommended when using hydroquinone.[35] Its application only to affected areas lowers the risk of lightening the color of normal skin but can lead to a temporary ring of lightened skin around the hyperpigmented area.[35] Hydroquinone is generally well-tolerated; side effects are typically mild (e.g., skin irritation) and occur with use of a higher than the recommended 4% concentration.[35] Most preparations contain the preservative sodium metabisulfite, which has been linked to rare cases of allergic reactions including anaphylaxis and severe asthma exacerbations in susceptible people.[35] In extremely rare cases, repeated improper topical application of high-dose hydroquinone has been associated with an accumulation of homogentisic acid in connective tissues, a condition known as exogenous ochronosis.[35]
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 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.


Hormonal activity, such as occurs during menstrual cycles and puberty, may contribute to the formation of acne. During puberty, an increase in sex hormones called androgens causes the skin follicle glands to grow larger and make more oily sebum.[12] Several hormones have been linked to acne, including the androgens testosterone, dihydrotestosterone (DHT), and dehydroepiandrosterone (DHEA); high levels of growth hormone (GH) and insulin-like growth factor 1 (IGF-1) have also been associated with worsened acne.[42] Both androgens and IGF-1 seem to be essential for acne to occur, as acne does not develop in individuals with complete androgen insensitivity syndrome (CAIS) or Laron syndrome (insensitivity to GH, resulting in very low IGF-1 levels).[43][44]

^ Hay, RJ; Johns, NE; Williams, HC; Bolliger, IW; Dellavalle, RP; Margolis, DJ; Marks, R; Naldi, L; Weinstock, MA; Wulf, SK; Michaud, C; Murray, C; Naghavi, M (October 2013). "The Global Burden of Skin Disease in 2010: An Analysis of the Prevalence and Impact of Skin Conditions". The Journal of Investigative Dermatology. 134 (6): 1527–34. doi:10.1038/jid.2013.446. PMID 24166134.

Most people find themselves suffering from an acne outbreak at some point usually during their adolescence when they go through puberty. Whether it's due to hormones or stress. Contrary to popular belief, pimples don't necessarily mean your skin is dirty or unclean — in fact, over-cleansing can irritate your skin even more. However, hormones aren't uncontrollable, and there are simple changes you can make to eliminate your breakouts. You can have your glowing, healthy, and pimple-free skin back in no time.
Post-inflammatory hyperpigmentation is not an acne scar, but a red, pink, brown or tan skin discoloration where acne has previously flared up. It'll usually disappear on its own in a year or so. Many skin lightening products claim to help reduce the visibility of these acne "scars." Their active ingredient, hydroquinone, works to slow melanin production and can reduce dark brown marks, but melanin isn't the cause of red and pink acne discolorations. A better option is to use the best foundation for acne prone skin you can find to hide the marks until they naturally fade away.
What to know about hormonal imbalances While it is natural to experience hormonal imbalances at certain times in life, such as puberty, menopause, and pregnancy, some hormonal changes are related to underlying medical conditions. This article looks at the causes and symptoms of hormonal imbalances in men and women, as well as treatment and home remedies. Read now
Recommended therapies for first-line use in acne vulgaris treatment include topical retinoids, benzoyl peroxide, and topical or oral antibiotics.[78] Procedures such as light therapy and laser therapy are not considered to be first-line treatments and typically have an adjunctive role due to their high cost and limited evidence of efficacy.[77] Medications for acne work by targeting the early stages of comedo formation and are generally ineffective for visible skin lesions; improvement in the appearance of acne is typically expected between eight and twelve weeks after starting therapy.[15]
^ Jump up to: a b GBD 2015 Disease and Injury Incidence and Prevalence, Collaborators. (8 October 2016). "Global, regional, and national incidence, prevalence, and years lived with disability for 310 diseases and injuries, 1990-2015: a systematic analysis for the Global Burden of Disease Study 2015". Lancet. 388 (10053): 1545–1602. doi:10.1016/S0140-6736(16)31678-6. PMC 5055577. PMID 27733282.
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Post-inflammatory hyperpigmentation is not an acne scar, but a red, pink, brown or tan skin discoloration where acne has previously flared up. It'll usually disappear on its own in a year or so. Many skin lightening products claim to help reduce the visibility of these acne "scars." Their active ingredient, hydroquinone, works to slow melanin production and can reduce dark brown marks, but melanin isn't the cause of red and pink acne discolorations. A better option is to use the best foundation for acne prone skin you can find to hide the marks until they naturally fade away.
This article was medically reviewed by Hilary Baldwin, MD. Baldwin, medical director of the Acne Treatment Research Center, is a board-certified dermatologist with nearly 25 years of experience. Her area of expertise and interest are acne, rosacea and keloid scars. Baldwin received her BA and MA in biology from Boston University. She became a research assistant at Harvard University before attending Boston University School of Medicine. She then completed a medical internship at Yale New Haven Hospital before becoming a resident and chief resident in dermatology at New York University Medical Center.
Antiandrogens such as cyproterone acetate and spironolactone have been used successfully to treat acne, especially in women with signs of excessive androgen production such as increased hairiness or skin production of sebum, or baldness.[10][47] Spironolactone is an effective treatment for acne in adult women, but unlike combined birth control pills, is not approved by the United States Food and Drug Administration for this purpose.[1][36][100] The medication is primarily used as an aldosterone antagonist and is thought to be a useful acne treatment due to its ability to additionally block the androgen receptor at higher doses.[36] Alone or in combination with a birth control pill, spironolactone has shown a 33 to 85% reduction in acne lesions in women.[91] The effectiveness of spironolactone for acne appears to be dose-dependent.[91] High-dose cyproterone acetate alone has been found to decrease symptoms of acne in women by 75 to 90% within 3 months.[101] It is usually combined with an estrogen to avoid menstrual irregularities and estrogen deficiency.[102] The medication has also been found to be effective in the treatment of acne in males, with one study finding that a high dosage reduced inflammatory acne lesions by 73%.[103][104] However, the side effects of cyproterone acetate in males, such as gynecomastia, sexual dysfunction, and decreased bone mineral density, make its use for acne in this sex impractical in most cases.[103][104][105] Hormonal therapies should not be used to treat acne during pregnancy or lactation as they have been associated with birth disorders such as hypospadias, and feminization of the male babies.[47] In addition, women who are sexually active and who can or may become pregnant should use an effective method of contraception to prevent pregnancy while taking an antiandrogen.[106] Antiandrogens are often combined with birth control pills for this reason, which can result in additive efficacy.[36][107]

Isotretinoin is a standard prescription that you can get from your doctor. You may have heard of the brand names Absorica®, Accutane®, Amnesteem®, Claravis®, Myorisan®, Sotret® and Zenatane™. CBS News reports that Accutane has some pretty serious side effects, possibly even death. One man reported severe inflammatory bowel disorder that required removal of his colon. It’s been noted that it can cause miscarriage, birth defects, increased internal skull pressure, bone mineral density problems, depression, psychosis, suicide, aggressive or violent behaviors, acute pancreatitis, cardiovascular issues, deafness, hepatitis, bowel disease, excessive bone growth, night blindness and sight loss. (6) 
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.
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
Blackheads appear as small black dots on the skin. They usually occur on the face – especially the nose and T-Zone – but can also be seen on the back, neck, chest, shoulders and arms. Blackheads are one of two types of comedones, or acne lesions caused by clogged pores. Blackhead comedones are open versus closed, leaving the plug at the top of the clogged pore exposed to air on the skin’s surface. It’s this exposure to oxygen that accounts for their color, which can not only be black but also gray, yellow or brown. When melanin – a pigment produced by oil glands and found within sebum – makes contact with air, it oxidizes and turns dark. Blackheads are a mild, usually painless form of acne, as there’s less inflammation associated with this type of lesion.
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.
Your skin is your largest organ, and it does a lot more than simply prevent you from spilling out all over the place. Skin cells are constantly replacing themselves, making a journey from the inner edge of your epidermis (your skin's outermost layer) to the outside of your skin. As a skin cell ages and approaches the skin's surface, the dying cell flattens out. Once on the surface, it joins countless other dead skin cells and forms a protective layer that helps protect you from bacteria and viruses.
No one knows exactly what causes acne. Hormone changes, such as those during the teenage years and pregnancy, probably play a role. There are many myths about what causes acne. Chocolate and greasy foods are often blamed, but there is little evidence that foods have much effect on acne in most people. Another common myth is that dirty skin causes acne; however, blackheads and pimples are not caused by dirt. Stress doesn't cause acne, but stress can make it worse.
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