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Ecthyma

Contents of this page:

Illustrations

Ecthyma
Ecthyma
Ecthyma gangrenosum
Ecthyma gangrenosum

Definition    Return to top

Ecthyma is a skin infection similar to impetigo. It is often called "deep impetigo" because it occurs deep inside the skin.

Causes    Return to top

Ecthyma is most often caused by the bacteria streptococcus. Sometimes, staphylococcus bacteria causes this skin infection.

The infection may start in skin that has been injured due to a scratch or insect bite. It often develops on the legs.

Symptoms    Return to top

The main symptom of ecthyma is a small blister with a red border that may be filled with pus. The blister is similar to that seen in persons with impetigo, but the infection spreads much deeper into the skin.

After the blister goes away, a crusty ulcer appears.

Exams and Tests    Return to top

Your doctor can usually diagnose this condition simply by looking at your skin. In rare cases, the fluid inside the blister may be sent to a lab for closer examination or a skin biopsy may be done.

Treatment    Return to top

Your doctor will usually prescribe antibiotics by mouth (oral antibiotics). Very early cases may be treated with topical medications. More advanced forms may need antibiotics given through a vein (intravenous antibiotics).

Placing a warm wet cloth over the area can help remove ulcer crusts. Your doctor may recommend antiseptic soap or peroxide washes to speed recovery.

Outlook (Prognosis)    Return to top

Unlike impetigo, ecthyma can sometimes result in scarring.

Possible Complications    Return to top

When to Contact a Medical Professional    Return to top

Make an appointment with your health care provider if you have symptoms of ecthyma.

Prevention    Return to top

Carefully clean the skin after an injury (such as a bite or scratch). Avoid scratching or digging at scabs and sores.

References    Return to top

Habif TP. Clinical Dermatology. 4th ed. St. Louis, Mo: Mosby; 2004.

Mandell GL, Bennett JE, Dolin R. Principles and Practice of Infectious Diseases. 6th ed. London: Churchill Livingstone; 2005.

Rakel RE. Textbook of Family Practice. 6th ed. Philadelphia, Pa: WB Saunders; 2002.

Update Date: 4/17/2009

Updated 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.

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