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Pustules

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.

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.

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.

Disclaimer

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. No warranty of any kind, either expressed or implied, is made as to the accuracy, reliability, timeliness, or correctness of any translations made by a third-party service of the information provided herein into any other language. © 1997- A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

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Pustules - superficial on the arm - Illustration Thumbnail

Pustules - superficial on the arm

An infection of the topmost layers of the skin, especially one caused by staphylococci, may produce pustules, which look like small blisters containing a thick, yellowish material.

Illustration

Acne - close-up of pustular lesions - Illustration Thumbnail

Acne - close-up of pustular lesions

Acne lesions frequently contain pus. This close-up photograph shows small acne pustules with surrounding inflammation (erythema).

Illustration

Acne - cystic on the face - Illustration Thumbnail

Acne - cystic on the face

The face is the most common location of acne. Here, there are 4 to 6 millimeter red (erythematous) pustules, some with bridging scars and fistulous tract formation (connecting passages). Severe acne may have a profound psychological impact and may cause scarring. Effective treatments are available for this type of acne.

Illustration

Dermatitis - pustular contact - Illustration Thumbnail

Dermatitis - pustular contact

This is a close-up of a dermatitis reaction. It consists of a large, red (erythematous) lesion (plaque) with numerous small pus-filled areas (pustules).

Illustration

 
 
Pustules - superficial on the arm - Illustration Thumbnail

Pustules - superficial on the arm

An infection of the topmost layers of the skin, especially one caused by staphylococci, may produce pustules, which look like small blisters containing a thick, yellowish material.

Illustration

Acne - close-up of pustular lesions - Illustration Thumbnail

Acne - close-up of pustular lesions

Acne lesions frequently contain pus. This close-up photograph shows small acne pustules with surrounding inflammation (erythema).

Illustration

Acne - cystic on the face - Illustration Thumbnail

Acne - cystic on the face

The face is the most common location of acne. Here, there are 4 to 6 millimeter red (erythematous) pustules, some with bridging scars and fistulous tract formation (connecting passages). Severe acne may have a profound psychological impact and may cause scarring. Effective treatments are available for this type of acne.

Illustration

Dermatitis - pustular contact - Illustration Thumbnail

Dermatitis - pustular contact

This is a close-up of a dermatitis reaction. It consists of a large, red (erythematous) lesion (plaque) with numerous small pus-filled areas (pustules).

Illustration

 
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