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Our Health Information Database is provided by A.D.A.M. the leading provider of electronic and printed information for professionals and consumers in healthcare and industry. It provides authoritative, reliable content written and reviewed by an editorial board who represent a variety of specialty areas. This board reviews and evaluates all healthcare information to ensure it is accurate, reliable, and can be used with complete confidence. And now you have access to the same authoritative, trusted clinical information relied upon by health professionals around the world.
Purpura

Definition

Purpura is purple-colored spots and patches that occur on the skin, organs, and in mucus membranes, including the lining of the mouth.

Alternative Names

Blood spots; Skin hemorrhages

Considerations

Purpura 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 Causes

Nonthrombocytopenic purpuras may be due to:

Thrombocytopenic purpura may be due to:

Home Care

Call your health care provider if

Call your doctor for an appointment if you have signs of purpura.

What to expect at your health care provider's office

Your doctor will examine your skin and ask you questions about your medical history and symptoms, including:

  • Is this the first time you have had such spots?
  • When did they develop?
  • What color are they?
  • Do they look like bruises?
  • What medications do you take?
  • What other medical problems have you had?
  • Does anyone in your family have similar spots?
  • What other symptoms do you have?

A skin biopsy may be done.

References

Goldman 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.

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    Review Date: 4/17/2009

    Review By: Michael Lehrer, MD, Department of Dermatology, University of Pennsylvania Medical Center, Philadelphia, PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

    The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- 2010 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

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