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Pustules are small, inflamed, pus-filled, blister-like sores (lesions) on the skin surface.


Pustules are common in acne. They may occur anywhere on the body, but are most commonly seen in these areas:

  • Back
  • Face
  • Over the breastbone
  • Shoulders
  • Sweaty areas, such as the groin or armpit

Pustules may be a sign of a bacterial infection. They should be checked by a health care provider.


Armstrong CA. Examination of the skin and approach to diagnosing skin diseases. In: Goldman L, Schafer AI, eds. Goldman's Cecil Medicine. 24th ed. Philadelphia, PA: Elsevier Saunders; 2011:chap 444.

Habif TM. Principles of diagnosis and anatomy. In: Habif TP, ed. Clinical Dermatology. 5th ed. Philadelphia, PA: Elsevier Mosby; 2009:chap 1.

Review Date: 12/2/2014
Reviewed By: Richard J. Moskowitz, MD, dermatologist in private practice, Mineola, NY. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.
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