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Acne Comedonica – Causes, Symptoms and Treatment

Acne comedonica is a mild form of acne characterized by clogged pores appearing as blackheads and whiteheads. It commonly develops during puberty.

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Things worth knowing about "Acne comedonica"

Acne comedonica is a mild form of acne characterized by clogged pores appearing as blackheads and whiteheads. It commonly develops during puberty.

What is Acne comedonica?

Acne comedonica is the mildest and most common form of acne. It is defined by the presence of comedones – clogged hair follicles – without significant inflammation. There are two types: open comedones (blackheads), where the pore content is exposed to air and oxidizes, turning dark; and closed comedones (whiteheads), where the follicle opening is sealed and a small flesh-colored or white bump forms beneath the skin surface.

Causes

Acne comedonica develops due to several interrelated factors:

Excess sebum production: Hormonal changes, especially during puberty, stimulate the sebaceous glands to produce more oil (sebum).
Abnormal keratinization: Dead skin cells (corneocytes) are not shed properly and, together with sebum, block the hair follicle.
Hormonal influences: Androgens (male hormones present in both sexes) play a key role in stimulating sebaceous gland activity.
Genetic predisposition: A family history of acne increases the likelihood of developing it.
External factors: Comedogenic cosmetics, environmental pollutants, and certain medications can contribute to comedone formation.

Symptoms

Unlike inflammatory forms of acne, acne comedonica typically presents with:

Open comedones (blackheads) – dark spots visible in the pores, most often on the nose, forehead, and chin
Closed comedones (whiteheads) – small, flesh-colored or whitish bumps just beneath the skin
Little to no redness or inflammation
No pustules or cysts

The most commonly affected area is the T-zone of the face (forehead, nose, and chin), though the back, chest, and shoulders may also be involved.

Diagnosis

Acne comedonica is typically diagnosed through a clinical skin examination by a dermatologist. The physician assesses the type, number, and distribution of skin lesions. Laboratory testing is usually not necessary for purely comedonal acne. If a hormonal cause is suspected, blood tests may be recommended.

Treatment

Treatment of acne comedonica aims to unclog pores, regulate sebum production, and prevent worsening of the condition.

Topical (External) Treatment

Retinoids: Adapalene or tretinoin promote cell turnover and prevent new comedone formation. They are considered the first-line treatment.
Benzoyl peroxide: Has antibacterial and keratolytic (skin-peeling) properties.
Azelaic acid: Regulates skin cell turnover and has anti-inflammatory effects.
Salicylic acid: Available over the counter, it helps dissolve dead skin cells and unclogs pores.

Skincare and Prevention

Use non-comedogenic (pore-friendly) skincare products and cosmetics
Gentle twice-daily cleansing of affected areas
Avoid squeezing or picking at comedones, as this can cause inflammation and scarring
Professional comedone extraction by a dermatologist or licensed esthetician

Additional Treatment Options

Chemical peels using alpha-hydroxy acids (e.g., glycolic acid) can help smooth skin texture and reduce comedones.
In more severe or hormone-related cases, systemic therapies such as oral retinoids or hormonal contraceptives may be considered.

References

Nast A. et al. - S3 Guidelines for the Treatment of Acne. German Dermatological Society (DDG), 2022. Available at: https://www.awmf.org
Zouboulis CC. - Acne and sebaceous gland function. Clinics in Dermatology, 2004; 22(5): 360-366.
Thiboutot D. et al. - New insights into the management of acne: An update from the Global Alliance to Improve Outcomes in Acne Group. Journal of the American Academy of Dermatology, 2009; 60(5 Suppl): S1-S50.

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