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Erythrasma is a long-term bacterial infection that usually appears in the area between overlapping skin (skin folds).


Erythrasma is caused by the bacteria Corynebacterium minutissimum.

Erythrasma is more common in warm climates. You are more likely to develop this condition if you are overweight or have diabetes.


The main symptoms are reddish-brown slightly scaly patches with sharp borders. The patches occur in moist areas such as the groin, armpit, and skin folds. They may itch slightly and often look like patches associated with other fungal infections, such as ringworm.

Signs and tests
Support Groups

Expectations (prognosis)

Complete recovery is expected following treatment.

Calling your health care provider

Call for an appointment with your health care provider if symptoms of erythrasma develop.



Gently scrubbing the skin patches with antibacterial soap may help them go away. Prescription erythromycin gel applied to the skin also works very well. In severe cases, your doctor may prescribe erythromycin pills.


These measures may reduce the risk of erythrasma:

  • Maintaining good hygiene
  • Keeping the skin dry
  • Wearing clean, absorbent clothing
  • Avoiding excessive heat or moisture
  • Maintaining healthy body weight

Review Date: 10/28/2008
Reviewed By: Michael Lehrer, M.D., 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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