Crust (dermatology)

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Pustule
Other names: Scab[1]
Crust
SpecialtyDermatology
SymptomsDry fluid on skin[1]
CausesPemphigus vulgaris,[2] impetigo,[3] scabies[4]
Diagnostic methodVisualisation[1]

Crust, also known as a scab, is dry fluid on skin.[1] The fluid generally comprises of dried serum, blood or pus, and is mixed with skin cells and sometimes bacterial debris.[5] Bloody crust may appear red, purple or black.[6] Moist red skin is typically revealed when the crust falls off.[1]

Conditions that produce crust include and pemphigus vulgaris,[2] impetigo,[3] and scabies.[4]

Gallery

See also

References

  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. 2.0 2.1 Morris-Jones, Rachael (2019). "1. Introduction". In Morris-Jones, Rachael (ed.). ABC of Dermatology (7th ed.). Hoboken: Wiley Blackwell. pp. 4–6. ISBN 978-1-119-48899-6. Archived from the original on 2023-02-09. Retrieved 2023-02-09.
  3. 3.0 3.1 Benedetti, Julia (December 2021). "Description of Skin Lesions - Dermatologic Disorders". MSD Manual Professional Edition. Archived from the original on 15 April 2022. Retrieved 15 May 2022.
  4. 4.0 4.1 Morris-Jones, Rachael (2019). "15. HIV and skin". In Morris-Jones, Rachael (ed.). ABC of Dermatology (7th ed.). Hoboken: Wiley Blackwell. pp. 128–129. ISBN 978-1-119-48899-6. Archived from the original on 2023-02-09. Retrieved 2023-02-09.
  5. Bolognia, Jean L.; Schaffer, Julie V.; Duncan, Karynne O.; Ko, Christine (2022). "1. Basics". Dermatology Essentials (2nd ed.). Elsevier. p. 9. ISBN 978-0-323-70971-2. Archived from the original on 2024-02-12. Retrieved 2024-02-12.
  6. Oakley, Amanda. "Terminology in dermatology | DermNet NZ". dermnetnz.org. Archived from the original on 9 March 2022. Retrieved 15 May 2022.