What is Seborrheic Melanosis?

Seborrheic melanosis is a benign (non-cancerous) skin condition that results in dark pigmentation (melanin overproduction) in areas with excess oil (sebum) production—often overlapping with seborrheic dermatitis.

It is not harmful, but it can cause cosmetic concerns due to hyperpigmentation, especially on the face.

Causes & Risk Factors

Seborrheic melanosis often arises due to:
- Chronic inflammation (as in seborrheic dermatitis)
- Excess oil production
- Fungal colonization (Malassezia species)
- Skin rubbing or irritation
- Exposure to sunlight (UV), which increases pigmentation
- Hormonal factors and genetic tendency

Commonly Affected Areas

- Forehead
- Sides of the nose
- Eyebrows
- Behind the ears
- Scalp margins
- Upper chest and back

Symptoms

- Dark brown to blackish patches
- Often greasy or mildly scaly
- May be associated with itching or redness if seborrheic dermatitis is active
- Cosmetically noticeable especially in fair-skinned people

Diagnosis

Diagnosis is usually clinical (by appearance). Your dermatologist may:
- Examine your skin with a dermatoscope
- Rule out other causes of pigmentation such as:
  • Lichen planus pigmentosus
  • Melasma
  • Post-inflammatory hyperpigmentation
  • Contact dermatitis
- Rarely, a skin biopsy may be needed

Treatment

Treatment focuses on reducing pigmentation and controlling oil and inflammation.

1. Topical Treatments:
- Ketoconazole or ciclopirox creams (anti-fungal)
- Mild steroid creams (only for short term)
- Calcineurin inhibitors (like tacrolimus for inflammation)
- Depigmenting agents:
  • Kojic acid
  • Azelaic acid
  • Arbutin
  • Niacinamide
  • Hydroquinone (only under supervision)

2. Face Washes:
- Medicated cleansers with:
  • Zinc pyrithione
  • Salicylic acid
  • Ketoconazole

3. Sun Protection:
- Broad-spectrum sunscreen is crucial
- Use daily, even indoors

4. Procedures (if needed):
- Chemical peels (like glycolic or salicylic acid)
- Laser treatments (under dermatologist supervision)

Prevention Tips

- Keep your skin clean and oil-free
- Avoid heavy creams or oils on face
- Use non-comedogenic (non-pore-clogging) skincare
- Wash face twice daily
- Control dandruff or scalp issues
- Avoid scratching or rubbing affected areas
- Always apply sunscreen