Purpura is purple-colored spots and patches that occur on the skin, organs, and in mucus membranes, including the lining of the mouth.
Alternative NamesBlood spots; Skin hemorrhages
ConsiderationsPurpura occurs when small blood vessels under the skin leak.
When purpura spots are very small, they are called petechiae. Large purpura are called ecchymoses.
Platelets help the blood clot. A person with purpura may have normal platelet counts (nonthrombocytopenic purpuras) or decreased platelet counts (thrombocytopenic purpuras).
Common CausesNonthrombocytopenic purpuras may be due to:
Thrombocytopenic purpura may be due to:
Call your doctor for an appointment if you have signs of purpura.
What to expect at your health care provider's officeYour doctor will examine your skin and ask you questions about your medical history and symptoms, including:
A skin biopsymay be done.
ReferencesGoldman L, Ausiello D. Cecil Textbook of Medicine. 22nd ed. Philadelphia, Pa: WB Saunders; 2004:2410.
Hoffman R, Benz EJ, Shattil SS, et al. Hematology: Basic Principles and Practice. 4th ed. Orlando, Fl: Churchill Livingstone; 2005.