Ecthyma



Ecthyma

Definition

Ecthyma is a skin infection similar to impetigo

Causes

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.

Exams 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.

Outlook (Prognosis)

Unlike impetigo, ecthyma can sometimes result in scarring.

Possible Complications

  • Spread of infection to other parts of the body
  • Permanent skin damage with scarring

When to Contact a Medical Professional

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.

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.

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