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]
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 six and eight weeks after starting therapy.[1]
There are two big guns used to take down acne, and they're both great at doing entirely different things. Salicylic acid is a beta hydroxy acid that comes from willow bark and works primarily as an exfoliator, breaking down fatty acids like sebum so your pores don’t clog. (Glycolic acid works similarly but is less effective.) These acids do their thing on comedones — whiteheads, blackheads, and other non-red bumps.
Acne vulgaris and its resultant scars have been associated with significant social and academic difficulties that can last into adulthood, including difficulties obtaining employment.[30][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]

One of the best face washes for sensitive skin, this soap-free, fragrance-free, non-comedogenic cleanser works to remove excess oil from your skin without irritation. It’s great for oily and combination skin types, as it cleans and purifies without making the skin taut and dry. Its formula is glycerin-based for a gentle cleanser that won’t provoke even the most sensitive of skin types.
Isotretinoin is an oral retinoid that is very effective for severe nodular acne, and moderate acne that is stubborn to other treatments.[1][19] One to two months use is typically adequate to see improvement. Acne often resolves completely or is much milder after a 4–6 month course of oral isotretinoin.[1] After a single course, about 80% of people report an improvement, with more than 50% reporting complete remission.[19] About 20% of patients require a second course.[19] Concerns have emerged that isotretinoin use is linked with an increased risk of adverse effects, like depression, suicidality, anemia, although there is no clear evidence to support some of these claims.[1][19] Isotretinoin is superior to antibiotics or placebo in reducing acne lesions.[16] The frequency of adverse events was about twice as high with isotretinoin, although these were mostly dryness-related events.[16] No increased risk of suicide or depression was conclusively found.[16] Isotretinoin use in women of childbearing age is regulated due to its known harmful effects in pregnancy.[19] For such a woman to be considered a candidate for isotretinoin, she must have a confirmed negative pregnancy test and use an effective form of birth control.[19] In 2008, the United States started the iPLEDGE program to prevent isotretinoin use during pregnancy.[85] iPledge requires the woman under consideration for isotretinoin therapy to have two negative pregnancy tests and mandates the use of two types of birth control for at least one month before therapy begins and one month after therapy is complete.[85] The effectiveness of the iPledge program has been questioned due to continued instances of contraception nonadherence.[85][86]

First, let’s talk about what causes acne. Pimples form when the oil and dead skin cells on your skin combine to form a plug that blocks the pores. “As the P. acnes bacteria that naturally live on skin overgrow within this plugged follicle, the area becomes inflamed and this is when you start to see papules, pustules, and cystic lesions,” RealSelf dermatologist Sejal Shah, M.D., tells SELF. The treatments ahead work to exfoliate away dead skin cells, suck up excess oil, stop inflammation, and kill the P. acnes bacteria. There are even a few treatments that target hormonal acne specifically.
– Also known as peroxide benzoyl. This ingredient supplies oxygen to your skin which works to kill the bacteria that brings about pimples and breakouts. The scientific name for this bacteria is Proprioni Bacterium. This bacterium thrives in oxygen-less areas. Therefore, oxygen is needed to battle this bacteria and this is what benzoyl peroxide delivers.
Several scales exist to grade the severity of acne vulgaris, but no single technique has been universally accepted as the diagnostic standard.[68][69] Cook's acne grading scale uses photographs to grade severity from 0 to 8 (0 being the least severe and 8 being the most severe). This scale was the first to use a standardized photographic protocol to assess acne severity; since its creation in 1979, the scale has undergone several revisions.[69] The Leeds acne grading technique counts acne lesions on the face, back, and chest and categorizes them as inflammatory or non-inflammatory. Leeds scores range from 0 (least severe) to 10 (most severe) though modified scales have a maximum score of 12.[69][70] The Pillsbury acne grading scale simply classifies the severity of the acne from grade 1 (least severe) to grade 4 (most severe).[68][71]

That’s why, no matter how uncomfortable your skin may feel while plagued with acne, you must resist the urge to touch your skin. If the irritating sensations become unbearable, there are other methods of treating your skin, such as cooling it with ice packs or aloe vera gel. You can even use medicated creams designed to soothe irritated skin – given that your dermatologist says it’s okay.
ungrouped: Paronychia Acute Chronic Chevron nail Congenital onychodysplasia of the index fingers Green nails Half and half nails Hangnail Hapalonychia Hook nail Ingrown nail Lichen planus of the nails Longitudinal erythronychia Malalignment of the nail plate Median nail dystrophy Mees' lines Melanonychia Muehrcke's lines Nail–patella syndrome Onychoatrophy Onycholysis Onychomadesis Onychomatricoma Onychomycosis Onychophosis Onychoptosis defluvium Onychorrhexis Onychoschizia Platonychia Pincer nails Plummer's nail Psoriatic nails Pterygium inversum unguis Pterygium unguis Purpura of the nail bed Racquet nail Red lunulae Shell nail syndrome Splinter hemorrhage Spotted lunulae Staining of the nail plate Stippled nails Subungual hematoma Terry's nails Twenty-nail dystrophy
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.
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