Pustules are small, inflamed, pus-filled, blister-like sores (lesions) on the skin surface.
- Over the breastbone
- Sweaty areas, such as the groin or armpit
Pustules may be a sign of an infection. They should be checked by a health care provider and may need to be tested (cultured) for bacteria or fungus.
Habif TP. Principles of diagnosis and anatomy. In: Habif TP, ed. Clinical Dermatology: A Color Guide to Diagnosis and Therapy. 6th ed. Philadelphia, PA: Elsevier; 2016:chap 1.
Marks JG, Miller JJ. Pustules. In: Marks JG, Miller JJ, eds. Lookingbill and Marks' Principles of Dermatology. 6th ed. Philadelphia, PA: Elsevier; 2019:chap 12.
Last reviewed on: 10/8/2018
Reviewed by: Linda J. Vorvick, MD, Clinical Associate Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.