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.[34] People with darker skin color are more frequently affected by this condition.[35] 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.[36] Even minimal skin exposure to the sun's ultraviolet rays can sustain hyperpigmentation.[34] Daily use of SPF 15 or higher sunscreen can minimize such a risk.[36]


How to Handle It: Think of these as bigger, pissed-off whiteheads. Your best bet, says Zeichner, is to stock up on benzoyl peroxide, which kills the bacteria. A spot treatment like Murad Acne Spot Fast Fix ($22) should do the trick. Also, try not to pop them — as tempting as that may be. Since they're inflamed, they're more likely to scar if you go the DIY route.
Remember, when making the choice to buy a certain face wash, always consider your unique skin type. A face wash tailored to your skin type will give you the best results, and help you clear up your acne. Also, keep in mind that a good face wash is only one important step in a system of skin care for clear and healthy skin. With the right adjustments, you can achieve that glowing, beautiful skin you know you deserve.

Oral isotretinoin is very effective. But because of its potential side effects, doctors need to closely monitor anyone they treat with this drug. Potential side effects include ulcerative colitis, an increased risk of depression and suicide, and severe birth defects. In fact, isotretinoin carries such serious risk of side effects that all people receiving isotretinoin must participate in a Food and Drug Administration-approved risk management program.


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.
It is widely suspected that the anaerobic bacterial species Propionibacterium acnes (P. acnes) contributes to the development of acne, but its exact role is not well understood.[2] There are specific sub-strains of P. acnes associated with normal skin, and moderate or severe inflammatory acne.[49] It is unclear whether these undesirable strains evolve on-site or are acquired, or possibly both depending on the person. These strains have the capability of changing, perpetuating, or adapting to the abnormal cycle of inflammation, oil production, and inadequate sloughing of dead skin cells from acne pores. Infection with the parasitic mite Demodex is associated with the development of acne.[29][50] It is unclear whether eradication of the mite improves acne.[50]
Combined oral contraceptive pills contain progesterone and estrogen and help to balance out the levels of testosterone in the body12 One obvious effect of this is birth control, but dermatologists have also found it very useful for treating hormonal acne. Testosterone doesn’t directly cause acne, but when hormone levels fluctuate and testosterone increases above its baseline level, it can lead to increased acne for some. This is because increases in testosterone and other androgens leads to an increase in sebum production, which can cause more clogged pores and more p. acnes bacteria, leading to blackheads, whiteheads, pimples, or even cysts.
Acne removal: Your dermatologist may perform a procedure called “drainage and extraction” to remove a large acne cyst. This procedure helps when the cyst does not respond to medicine. It also helps ease the pain and the chance that the cyst will leave a scar. If you absolutely have to get rid of a cyst quickly, your dermatologist may inject the cyst with medicine.
×