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Pustules

Definition

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

Considerations

Pustules are common in acne and folliculitis (inflammation of the hair follicle). 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 an infection. In some cases, they are non-infectious and associated with inflammation in the skin or taking certain medicines. They should be checked by a health care provider and may need to be tested (cultured) for bacteria or fungus.

References

Dinulos JGH. Principles of diagnosis and anatomy. In: Dinulos JGH, ed. Habif's Clinical Dermatology. 7th ed. Philadelphia, PA: Elsevier; 2021: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.

Review Date: 11/30/2022
Reviewed By: Ramin Fathi, MD, FAAD, Director, Phoenix Surgical Dermatology Group, Phoenix, AZ. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

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