The Bottom Line

Acne keloidalis nuchae (AKN) is a chronic skin condition that causes bumps, sores, and keloid-like scars on the back of the neck and lower scalp. It mostly affects Black men aged 13–40, especially those who get close-cut haircuts. AKN can lead to permanent hair loss if not treated early. The first step in treatment — and the most important — is changing how you cut your hair. Early medical treatment can prevent serious scarring.

What Is Acne Keloidalis Nuchae?

Despite its name, acne keloidalis nuchae (AKN) is not regular acne. It is a chronic inflammatory condition of the hair follicles at the back of the neck and lower scalp. Over time, the inflammation causes raised, hard scars called keloids to form — scars that grow beyond the original wound. Without treatment, these can grow large, become painful, and cause permanent hair loss in the affected area.

AKN affects about 0.45–1% of Black American men, compared to less than 0.1% of white men. It is rare in women.

What Causes It?

The main trigger is close-cut or shaved hair — particularly military-style or razor-fade haircuts. When hair is cut very short (1–3 mm), the stubble can curve back and poke into the hair follicle, triggering an inflammatory reaction. The body then responds with excessive scar tissue, forming keloids. People of African descent have a higher genetic tendency to form keloids, which is why AKN is much more common in this population.

Other contributing factors include:

  • Bacteria such as Staphylococcus aureus and C. acnes that infect hair follicles
  • Rubbing and friction from shirt collars and helmets
  • Associated conditions like hidradenitis suppurativa or folliculitis of the scalp (which occur in 15–20% of AKN patients)

What Does It Look Like?

AKN changes in appearance as it progresses:

  • Early stage: Small, itchy or painful bumps (papules and pustules) along the hairline at the back of the neck. You may notice tenderness when touching the area or wearing a collar.
  • Progressive stage: The bumps merge and become firmer, forming raised, flesh-colored or darker keloid nodules that grow beyond the original bump. These may drain pus or fluid.
  • Advanced stage: Large keloid plaques (5 cm or more) with permanent hair loss in the scarred area. Neck stiffness can develop in severe cases due to scar contracture.

About 40–50% of patients experience pain, 30–40% have itching, and 50% notice drainage from lesions at some point.

Treatment Options

Early treatment gives the best results. The longer AKN is left untreated, the harder it is to reverse.

Step 1: Change Your Haircut (Most Important)

The single most effective thing you can do is stop cutting your hair very short. Grow hair to at least 6 mm (about a quarter inch) so stubble cannot perforate the follicle. Use scissors or clippers with a longer guard rather than a razor. Some people benefit from using a hair removal cream (depilatory) instead of shaving the nape area.

Step 2: Injections and Medications

  • Intralesional corticosteroid injections: Triamcinolone injected directly into keloid tissue monthly — a series of 4–6 injections achieves 60–70% improvement in size and redness. Most effective in early disease.
  • Oral antibiotics: Doxycycline or minocycline for 3–6 months reduces inflammation and bacterial load, achieving 40–50% improvement in active bumps.
  • Topical steroids: Strong steroid creams under occlusion may help mild, early lesions but work best as add-on therapy.

Step 3: Surgery (for Advanced Cases)

Surgical removal of large keloids that do not respond to injections is an option. Excision combined with post-surgery steroid injections (for 6 months) reduces recurrence to 5–10%. Surgery alone (without injections) has a much higher recurrence rate (40–50%).

Radiation Therapy

Post-surgical radiation can reduce recurrence to less than 10% for very large or repeatedly returning keloids, but it is reserved for severe cases due to cosmetic side effects and long-term safety considerations.

When to See a Dermatologist

  • You notice recurring bumps or sores at the back of your neck or hairline
  • Bumps are becoming firmer, larger, or more painful
  • You have drainage or pus from the area
  • You notice hair loss in the bumpy area
  • Over-the-counter products are not helping

Early treatment — before keloids form — has a much better outcome. Do not wait until bumps become large scars.

Frequently Asked Questions

Can AKN be cured?

AKN can be well controlled but is difficult to fully cure, especially once keloids have formed. Changing your haircut can stop the progression and prevent new lesions. Existing keloids can be reduced significantly with injections or surgery. Consistent follow-up with a dermatologist is important.

Will hair grow back in the scarred area?

Unfortunately, once hair follicles are destroyed by scar tissue, hair loss in that area is usually permanent. This is why early treatment matters — treating AKN before follicles are destroyed can preserve hair in the affected area.

Is AKN the same as razor bumps (pseudofolliculitis barbae)?

They are related but different. Razor bumps (pseudofolliculitis barbae) affect the beard area and are caused by ingrown hairs, while AKN affects the back of the neck and hairline and leads to keloid scar formation. Both are more common in people with tightly curled hair and both are worsened by close shaving.

Is this condition hereditary?

There is a genetic component. People who form keloids easily — a trait more common in people of African descent — are at higher risk. Having a first-degree relative with keloids or AKN increases your risk. However, lifestyle factors (especially haircut style) are the main trigger you can control.

References

  1. Saxena U, Ramakrishnan KM. Acne keloidalis nuchae: epidemiology and pathogenesis. Indian J Dermatol. 2020;65(1):21-28.
  2. Ogunbiyi A. Acne keloidalis nuchae: prevalence, impact, and management challenges. Clin Cosmet Investig Dermatol. 2016;9:125-134.
  3. Kelly AP. Pseudofolliculitis barbae and acne keloidalis nuchae. Dermatol Clin. 2003;21(4):645-653.
  4. Rademaker M, Garioch JJ. Acne keloidalis nuchae: clinical and histologic review. J Am Acad Dermatol. 1989;21(1):18-25.
  5. Malkud S. Acne keloidalis nuchae: a review. J Dermatol Res. 2013;4(2):179-186.

Trusted Resources

Always consult a board-certified dermatologist for a diagnosis and treatment plan tailored to your specific condition.