Pigment Disorders
Pigmented Purpuric Dermatosis
PPD; Schamberg's disease
Uncommon but not rare; often on the legs
No — you cannot catch it or spread it
Harmless; often fades slowly on its own
What Is It?
Pigmented purpuric dermatosis (PPD) is a harmless skin condition where tiny blood vessels leak small amounts of blood into the skin. This leaves flat, cayenne-pepper-like reddish-brown spots, usually on the lower legs. It is benign — not a sign of a bleeding disorder or cancer.
Signs & Symptoms
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Reddish-brown, "cayenne pepper" speckled spots
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Flat patches that don't blanch fully when pressed
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Most common on the lower legs, sometimes higher
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Usually painless; occasionally mildly itchy
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New spots appear as older ones fade to brown
Why Does It Happen?
The exact cause is often unknown. Tiny surface capillaries become slightly leaky, releasing red blood cells that break down and leave rust-colored pigment. Contributing factors can include gravity and increased leg vein pressure, certain medications, exercise, and sometimes food additives. It is NOT contagious.
Treatment Options
PPD is harmless and often fades slowly over months to years. Treatment is not always needed, but a few measures can help appearance and itch.
REASSURANCE
Often the main step — it is benign and tends to fade over time.
COMPRESSION
Support stockings can reduce leg vein pressure and new spots.
TOPICAL STEROIDS
May reduce itching and inflammation when present.
REVIEW MEDICATIONS
Occasionally a triggering medication is identified and adjusted.
Tips for Managing It at Home
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Elevate the legs and consider support stockings
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Moisturize dry skin to reduce itch
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Note any new medications that preceded a flare
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Understand that brown staining fades slowly — this is expected
When to Call Your Provider
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Spots spread rapidly or are widespread and symptomatic
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You have unusual bruising, bleeding gums, or nosebleeds
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The area becomes painful, swollen, or ulcerated
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You're unsure whether it's PPD or another condition
Sources & further reading
The information in this handout is based on general dermatology guidance from the reputable organizations below. These links are provided for patients who wish to read more from trusted sources.
DermNet. Pigmented Purpuric Dermatoses. https://dermnetnz.org/topics/pigmented-purpuric-dermatoses
DermNet. Schamberg Disease. https://dermnetnz.org/topics/schamberg-disease
MSD/Merck Manual. Overview of Vasculitis. https://www.msdmanuals.com/professional/musculoskeletal-and-connective-tissue-disorders/vasculitis/overview-of-vasculitis
This handout is for general education and does not replace advice from your own provider. Always follow your provider’s specific instructions.
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