Erythema

Erythema

Erythema

Symptom defined as redness of the skin or mucous membranes mostly due to inflammation

Not to be confused with arrythmia or erythremia.

Erythema (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]

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Types

Causes

It can be caused by infection, massage, electrical treatment, acne medication, allergies, exercise, solar radiation (sunburn), photosensitization,[3] acute radiation syndrome, mercury toxicity, blister agents,[4] niacin administration,[5] or waxing and tweezing of the hairs—any of which can cause the capillaries to dilate, resulting in redness. Erythema is a common side effect of radiotherapy treatment due to patient exposure to ionizing radiation.

Diagnosis

Erythema disappears on finger pressure (blanching), whereas purpura or bleeding in the skin and pigmentation do not. 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

References

  1. [1]
    Mosby's Medical Dictionary (9th ed.). St. Louis, Missouri: Elsevier. 2013. ISBN 978-0-323-08541-0.
  2. [2]
    "erythema". Mosby's Medical, Nursing & Allied Health Dictionary (Fourth ed.). Mosby-Year Book. 1994. p. 570.
  3. [3]
    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
  4. [4]
    https://fas.org/nuke/guide/usa/doctrine/army/mmcch/Vesicant.htm#CLINICAL Archived 2017-12-12 at the Wayback Machine EFFECTS
  5. [5]
    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.
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