Mind the Gap atlas
Acne and acne keloidalis nuchae on Black skin
Key cue: Dark marks after pimples often concern patients more than active acne. AKN (firm bumps on posterior scalp) is a distinct Black-skin entity needing dermatology care.
Acne vulgaris affects > 80% of adolescents across all skin tones, but the sequelae differ markedly on Black skin: post-inflammatory hyperpigmentation is more prominent and prolonged, keloidal scarring is more common, and a specific variant — acne keloidalis nuchae (AKN) — almost exclusively affects Black men.
What it actually looks like
Textbook says
Textbook: comedones (open and closed), inflammatory papules and pustules, nodules, cysts. Distribution on face, chest, back. Standard treatment algorithm: topical retinoid + benzoyl peroxide ± topical antibiotic; severe cases oral doxycycline or isotretinoin.
On Black skin
Three features specific to Black skin:
- Post-inflammatory hyperpigmentation (PIH) — dark marks that linger for months after the active pimple resolves — is the patient's primary concern and is often more bothersome than the acne itself. Treating the active acne aggressively minimises PIH; addressing existing PIH uses sun protection, topical retinoids, azelaic acid, and sometimes hydroquinone.
- Pomade acne — comedonal acne on the forehead, temples, and hairline from heavy hair products — is common in patients using styling pomades or hair oils. Look at the distribution.
- Acne keloidalis nuchae (AKN) — firm, persistent papules and plaques on the posterior scalp and nape of the neck, often in rows — is almost exclusively a disease of Black men. It begins as folliculitis and progresses to keloid-like scarring with scarring alopecia. Do not pick or pluck; avoid close-cut shaving at the nape; early dermatology referral for topical and intralesional steroid therapy prevents progression.
- Pseudofolliculitis barbae (razor bumps) is an allied condition — ingrown hairs from curly hair re-entering the skin after shaving. Treatment: avoid close shaving, use single-blade razors, chemical depilatories, or laser hair removal.
What to look for
- Active acne: comedones, papules, pustules, or deeper cysts.
- Dark marks (PIH) where old pimples used to be — these are not scars and will fade slowly with time + sun protection.
- True scars: ice-pick, rolling, or boxcar depressions that are texture changes; these need dermatology intervention.
- Firm bumps on the posterior scalp/nape of the neck in a Black man — this is AKN, get dermatology attention before it spreads.
- Bumps only along the beard line after shaving — pseudofolliculitis barbae.
When to seek care
See primary care or dermatology within a few weeks for persistent acne or AKN. Addressing AKN early — before plaques coalesce and form thick keloids — dramatically improves outcome. Isotretinoin for severe acne is as effective in Black patients as white; do not let bias exclude you from this therapy. Ask about laser hair removal if pseudofolliculitis barbae is a persistent problem.
Common misdiagnosis
AKN is often initially misdiagnosed as simple folliculitis or 'ingrown hairs' — delaying effective treatment. PIH is sometimes mislabelled as scarring, leading patients to believe it is permanent when most of it will fade over 6-12 months.
See it for yourself — curated external imagery
We don't host clinical photos here. The links below go to peer-reviewed or open-access sources (Mind the Gap, DermNet NZ, PubMed Central, and similar). Each opens in a new tab.
- Mind the Gap handbook — acne and AKN plates.
- DermNet NZ — Acne keloidalis nuchae.
- Skin of Color Society — Acne in skin of colour.
- AAD — Types of acne — includes images across skin tones.
References
- Alexis AF, Sergay AB, Taylor SC. Common dermatologic disorders in skin of color: a comparative practice survey. Cutis. 2007;80(5):387-94. PMID: 18189024.
- Ogunbiyi A. Acne keloidalis nuchae: prevalence, impact, and management challenges. Clin Cosmet Investig Dermatol. 2016;9:483-489. PMID: 27980431.
- Callender VD, St Surin-Lord S, Davis EC, Maclin M. Postinflammatory hyperpigmentation: etiologic and therapeutic considerations. Am J Clin Dermatol. 2011;12(2):87-99. PMID: 21348540.
- Taylor SC, Cook-Bolden F, Rahman Z, Strachan D. Acne vulgaris in skin of color. J Am Acad Dermatol. 2002;46(2 Suppl):S98-106. PMID: 11807473.
Medical disclaimer
Educational content only. This is not a substitute for in-person evaluation. If you are worried about yourself or someone you love, see a clinician — and if you are concerned about an emergency sign described here, call 911 or your local emergency number. We do not host clinical imagery; the external references are for reader self-education and are not owned by or affiliated with Black Health.