Erythema
 | This article needs more citations. (December 2009) |
| Erythema | |
|---|---|
 | |
| Characteristic "bull's eye" rash (erythema migrans) of early Lyme disease | |
| Specialty | Dermatology |
Erythema (Ancient Greek: ἐρύθημα, from Greek erythros 'red') is redness of the skin or mucous membranes, caused by hyperemia (increased blood flow) in superficial capillaries.[1] It occurs with any skin injury, infection, or inflammation. Examples of erythema not associated with pathology include nervous blushes.[2]
Types
[edit]Causes
[edit]It can be caused by infection, massage, electrical treatment, acne medication, allergies, psoriasis, mast cell activation syndrome (MCAS),[3] exercise, solar radiation (sunburn), photosensitization,[4] acute radiation syndrome, mercury toxicity, blister agents,[5] niacin administration,[6] or waxing and tweezing of the hairs—any of which can cause the affected capillaries to dilate, resulting in redness. Erythema is a common side effect of radiotherapy treatment due to patient exposure to ionizing radiation.
Diagnosis
[edit]Erythema disappears on finger pressure (blanching), whereas purpura or bleeding in the skin and pigmentation do not.[7][8] There is no temperature elevation, unless it is associated with the dilation of arteries in the deeper layer of the skin.[citation needed]
See also
[edit]References
[edit]- ↑ Mosby's Medical Dictionary (9th ed.). St. Louis, Missouri: Elsevier. 2013. ISBN 978-0-323-08541-0.
- ↑ "Erythema". Mosby's Medical, Nursing & Allied Health Dictionary (Fourth ed.). Mosby-Year Book. 1994. p. 570.
- ↑ Valent P, Hartmann K, Bonadonna P, Niedoszytko M, Triggiani M, Arock M, Brockow K (2022-05-23). "Mast Cell Activation Syndromes: Collegium Internationale Allergologicum Update 2022". Int Arch Allergy Immunol. 183 (7): 693–705. doi:10.1159/000524532. PMC 9393812. PMID 35605594.
- ↑ Jane C. Quinn; Yuchi Chen; Belinda Hackney; Muhammad Shoaib Tufail; Leslie A. Weston; Panayiotis Loukopoulos (2018), "Acute-Onset High-Morbidity Primary Photosensitisation in Sheep Associated with Consumption of the Casbah and Mauro Cultivars of the Pasture Legume Biserrula", BMC Veterinary Research, 14 (1): 11, doi:10.1186/s12917-017-1318-7, PMC 5765607, PMID 29325550
- ↑ Vesicant Archived 2017-12-12 at the Wayback Machine EFFECTS
- ↑ Weterle R, Rybakowski J (Mar–Apr 1990). "Test niacynowy w schizofrenii" [The Niacin Test in Schizophrenia]. Psychiatr Pol (in Polish). 24 (2): 116–20. PMID 2084715.
- ↑ McKay, Marilynne (1990), "Office Techniques for Dermatologic Diagnosis", in Walker, H. Kenneth; Hall, W. Dallas; Hurst, J. Willis (eds.), Clinical Methods: The History, Physical, and Laboratory Examinations (3rd ed.), Boston: Butterworths, ISBN 978-0-409-90077-4, PMID 21250056, retrieved 2026-07-26
- ↑ Marks, JAMES G.; Miller, JEFFREY J. (2006-01-01), "CHAPTER 17 - Purpura", Lookingbill & Marks' Principles of Dermatology (Fourth Edition), Edinburgh: W.B. Saunders, pp. 235–244, doi:10.1016/B978-1-4160-3185-7.50022-9, ISBN 978-1-4160-3185-7, retrieved 2026-07-26
External links
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