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SymptomsSmall bump containing dead cells and purulent material[1]

A pustule is a small bump containing pus.[1] It is typically yellow or white, and may have a red tinge.[1] It is well defined, can occur on its own or in multiple numbers, and is not necessarily infected.[2] Conditions with pustules include pustular psoriasis and pustular drug reactions.[3]

Before pustules develop, they may have gone through a stage of being papulopustules or vesiculopustules, after having started off as papules and vesicles.[1] They can also originate directly as pustules.[1]

Signs and symptoms


  1. 1.0 1.1 1.2 1.3 1.4 James, William D.; Elston, Dirk; Treat, James R.; Rosenbach, Misha A.; Neuhaus, Isaac (2020). "2. Cutaneous signs and diagnosis". Andrews' Diseases of the Skin: Clinical Dermatology (13th ed.). Edinburgh: Elsevier. p. 13. ISBN 978-0-323-54753-6. Archived from the original on 2023-02-09. Retrieved 2023-02-09.
  2. Oakley, Amanda (2015). "Pustular skin conditions | DermNet NZ". dermnetnz.org. Archived from the original on 31 January 2022. Retrieved 19 April 2022.
  3. Morris-Jones, Rachael (2019). "1. Introduction". In Morris-Jones, Rachael (ed.). ABC of Dermatology (7th ed.). Hoboken: Wiley Blackwell. p. 4. ISBN 978-1-119-48899-6. Archived from the original on 2023-02-09. Retrieved 2023-02-09.