Erythema Dyschromicum Perstans (Ashy Dermatosis)

Ashy Dermatosis

Overview

Erythema dyschromicum perstans, also known as ashy dermatosis or dermatosis cenicienta, is an acquired disorder of hyperpigmentation characterized by symmetric, blue-gray to ash-colored macules and patches on the trunk and extremities. The cause is unknown but it is thought to involve an inflammatory process that leads to pigment incontinence (melanin dropping into the dermis). It is most common in Latin American populations.

Key Symptoms

• Symmetric, oval or irregularly shaped, blue-gray or ash-colored macules and patches
• Lesions may have a slightly raised, erythematous (red) border in early stages
• Typically found on the trunk, arms, face, and neck
• Lesions are usually asymptomatic (no itch or pain)
• New lesions may continue to appear over months to years
• Hyperpigmentation may persist indefinitely even after the inflammatory phase resolves

Affected Areas

Trunk, Arms, Face, Neck, Legs

Care Instructions

1. See a dermatologist for evaluation and biopsy to confirm the diagnosis and rule out other causes of hyperpigmentation.
2. No consistently effective treatment exists, though several options may be tried.
3. Topical corticosteroids, calcineurin inhibitors, or hydroquinone may provide modest improvement.
4. Clofazimine and dapsone have been reported to help in some cases.
5. Sun protection is recommended to prevent worsening of pigmentary contrast.
6. Reassurance that the condition is benign, though cosmetically bothersome.

Medical Disclaimer: This information is for educational purposes only and does not replace professional medical advice. Always consult a qualified dermatologist for diagnosis and treatment.

Prevalence: Uncommon; most commonly reported in Latin American populations, though occurs worldwide