The Bottom Line

Acne keloidalis nuchae (AKN) is a chronic inflammatory condition that causes firm, itchy, or painful bumps and keloid-like scars on the back of the neck and lower scalp. Despite its name, it is not true acne nor are the bumps true keloids. AKN most commonly affects men of African descent, typically beginning in the teens to 30s. Early treatment is important to prevent progression to large, disfiguring plaques. Treatment combines anti-inflammatory medications, hair care modifications, and sometimes surgery for advanced cases.

What Is Acne Keloidalis Nuchae (AKN)?

Acne keloidalis nuchae — also called folliculitis keloidalis or folliculitis keloidalis nuchae — is a chronic scarring condition of the hair follicles at the nape of the neck (occiput) and posterior hairline. It begins as small, itchy papules (bumps) around hair follicles that become chronically inflamed, merge together, and form firm, scar-like plaques over time.

AKN is NOT acne (it's a form of folliculitis and scarring, not comedonal acne), and the lesions are NOT true keloids (they're fibrotic papules and plaques arising from chronic follicular inflammation, not the same process as keloid scars). The name is a historical misnomer that has persisted in medical terminology.

AKN predominantly affects Black men (prevalence 0.5-13.6%), though it can also occur in Hispanic men, Asian men, and occasionally in women. It typically begins between ages 14 and 25 and persists chronically if untreated.

Signs and Symptoms of AKN

Early stage: Small, firm papules (2-4mm) on the back of the neck at or below the hairline. They may be flesh-colored, pink, or dark brown. Often itchy or mildly tender. Individual bumps may have a hair protruding from the center.

Intermediate stage: Papules enlarge and begin to merge. Pustules (pus-filled bumps) may develop, indicating secondary infection. Scarring begins — firm, fibrous tissue replaces normal skin. Hair loss occurs in the affected area as follicles are destroyed by scarring.

Advanced stage: Large, firm, keloid-like plaques form across the nape of the neck, sometimes extending several centimeters. The plaques may have sinus tracts (tunnels under the skin) that drain pus. Significant cosmetic disfigurement and permanent hair loss in the affected area. Secondary bacterial infection can cause pain, swelling, and abscess formation.

What Causes AKN?

The exact cause is not fully understood, but AKN appears to involve a combination of factors:

Curved hair follicles: Tightly curved hair (common in people of African descent) may re-enter the skin after cutting, causing a foreign body inflammatory reaction. This is similar to the mechanism of pseudofolliculitis barbae ("razor bumps") but occurs at the nape.

Mechanical irritation: Close-cut hairstyles, shirt collars, helmets, headrests, and habitual rubbing of the nape area are all associated with AKN. The friction triggers and perpetuates follicular inflammation.

Chronic inflammation: The initial follicular irritation triggers a disproportionate fibrotic (scarring) response in susceptible individuals, leading to the characteristic firm papules and plaques.

Contributing factors: Close haircuts at the nape (especially with clippers set very short), high humidity and sweating, obesity (skin folds at the nape), and possibly androgen hormones (which explains the male predominance).

Treatment Options for AKN

Preventive measures (essential for all stages):

  • Avoid very close haircuts at the nape — leave at least 1-2cm of hair length
  • Stop using straight razors or close clippers on the back of the neck
  • Avoid shirt collars and accessories that rub the nape
  • Keep the area clean and dry; avoid picking or scratching bumps

Medical treatment (mild to moderate AKN):

  • Topical corticosteroids: High-potency steroid creams or solutions (clobetasol 0.05%) applied daily to reduce inflammation
  • Intralesional steroid injections: Triamcinolone 10-40 mg/mL injected directly into papules and plaques every 4-6 weeks — highly effective for reducing size and symptoms
  • Topical retinoids: Tretinoin or adapalene to reduce follicular plugging
  • Oral antibiotics: Doxycycline 100mg daily for anti-inflammatory effect during active flares
  • Topical antibiotics: Clindamycin solution to reduce bacterial colonization

Surgical treatment (advanced AKN with large plaques):

  • Excision: Surgical removal of the entire plaque, with primary closure or healing by secondary intention. Cure rates are high (90%+) when the entire affected area is excised.
  • Laser hair removal: Nd:YAG 1064nm laser applied to the affected area destroys hair follicles, eliminating the root cause of the inflammation. Studies show significant improvement in 3-6 sessions.
  • Combination: Excision of large plaques followed by laser hair removal of the surrounding area to prevent recurrence.

When to See a Dermatologist

See a dermatologist as early as possible if you notice bumps forming on the back of your neck. Early-stage AKN (small papules) responds much better to medical treatment than advanced AKN (large plaques requiring surgery). Seek urgent evaluation if bumps become painful, swollen, or start draining pus (may indicate abscess requiring drainage). A dermatologist can confirm the diagnosis (distinguishing AKN from other conditions like folliculitis, carbuncles, or keloids) and start treatment before scarring becomes extensive.

Frequently Asked Questions

Is AKN contagious?

No — AKN is not contagious. It's an inflammatory and scarring condition of the hair follicles, not an infection (though secondary bacterial infection can develop in existing lesions). You cannot spread it to others or catch it from someone else.

Will AKN go away on its own?

No — AKN is a chronic, progressive condition. Without treatment, individual papules tend to enlarge, merge, and form progressively larger plaques over months to years. Early treatment stops progression and can clear mild cases. Established plaques rarely resolve without intervention.

Can I still get haircuts if I have AKN?

Yes, but modifications are essential. Inform your barber about your condition. Avoid clippers set below a #2 guard on the nape area. Don't use straight razors on the back of the neck. Some dermatologists recommend growing the hair slightly longer at the nape to avoid the re-entry of cut hairs that triggers inflammation. Laser hair removal of the nape area can permanently eliminate the need for close cuts in the affected zone.

Does laser hair removal cure AKN?

Laser hair removal (Nd:YAG 1064nm) is one of the most effective long-term treatments for AKN because it addresses the root cause — the hair follicle itself. By permanently reducing hair in the affected area, it eliminates the follicular inflammation that drives AKN. Studies show significant improvement after 3-6 sessions. It works best for early-to-moderate AKN; advanced cases with established plaques may need surgical excision first, followed by laser to prevent recurrence.

References

  1. Ogunbiyi A, George AO. Acne keloidalis in females: case report and review of literature. J Natl Med Assoc. 2005;97(5):736-738.
  2. Callender VD, Young CM, Haverstock CL, et al. An open label study of clobetasol propionate 0.05% and betamethasone valerate 0.12% in the treatment of AKN. Cutis. 2005;76(2):118-123.
  3. Esmat SM, Abdel Hay RM, Abu Zeid OM, Hosni HN. The efficacy of laser-assisted hair removal in the treatment of acne keloidalis nuchae. Eur J Dermatol. 2012;22(5):645-650.
  4. Alexis AF, Millikan LE. Acne keloidalis nuchae. Dermatol Clin. 2003;21(4):555-560.

Trusted Resources

Early treatment of AKN prevents progression to disfiguring plaques. See a dermatologist at the first sign of bumps on the back of your neck.