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.
The infection may first appear with a pus-filled blister, similar to that seen in persons with impetigo. However, the infection spreads much deeper into the skin.
Symptoms
The main symptom of ecthyma is a small blister with a red border that may be filled with pus. After the blister goes away, a crusty ulcer appears.
Signs and tests
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
Your doctor will usually prescribe 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.
Expectations (prognosis)
Unlike impetigo, ecthyma can sometimes result in scarring.
Complications
- Spread of infection to other parts of the body
- Permanent skin damage with scarring
Calling your health care provider
Make an appointment with your health care provider if you have symptoms of ecthyma.
Prevention
Carefully clean the skin after an injury (such as a bite or scratch). Avoid scratching or digging at scabs and sores.
References
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.
Review Date: 4/12/2007
Reviewed By: Kevin Berman, MD, PhD, Associate, Atlanta Center for Dermatologic Disease, Atlanta, GA. Review provided by VeriMed Healthcare Network.