Schamberg's Purpura(Capillaritis)

Key Points
Most common type of capillaritis which typically affects the lower legs
Exact cause is unknown, but may arise in relation to various factors
Consists of irregular brownish-red patches of skin bordered by cayenne pepper spots

Schamberg disease is the most common type of capillaritis, a condition in which skin becomes discolored due to leaking capillaries near the surface of the skin. Schamberg disease consists of groups of irregular brownish-red patches of skin which are bordered by cayenne pepper spots. Lesions typically form on the legs, but may develop anywhere on the skin, and are asymptomatic. The condition is chronic and affected persons may experience symptoms for years.

The exact cause of Schamberg disease is unknown, but it is thought to arise in relation to various factors, including drug reaction, viral infection, exercise or food additives. In rare cases the condition may be inherited. The condition may affect anyone, regardless of age.

Differential Diagnosis (Other conditions with similar appearance)
Drug eruption
Scurvy
Urticarial Vasculitis
Vasculitis

Diagnosis
Key Points
Initial diagnosis based on the characteristic appearance of the affected area
Skin biopsy, blood counts and other testing may be performed to rule out other conditions

Schamberg disease is initially diagnosed based on the characteristic appearance of the affected area. Skin biopsies, blood counts and other tests may be performed to confirm the diagnosis and to rule out similar appearing conditions.

Treatment
No cure for the condition
Eliminating the causal agent is the best treatment, when possible
Compression hose may be helpful in some cases

There is no cure for Schamberg disease, nor does any specific treatment exist. Elimination of the causal agent (such as medications or infection) may be the best treatment in some cases, when it is possible. Additionally, use of compression hose when the condition appears on the lower legs is often recommended by health care professionals.