Erythema

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Erythema
Classification and external resources
Erythema migrans - erythematous rash in Lyme disease - PHIL 9875.jpg
Characteristic "bull's eye" rash (erythema migrans) of early Lyme disease
ICD-10L51-L54
ICD-9695
DiseasesDB4466
MeSHD004890
 
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Erythema
Classification and external resources
Erythema migrans - erythematous rash in Lyme disease - PHIL 9875.jpg
Characteristic "bull's eye" rash (erythema migrans) of early Lyme disease
ICD-10L51-L54
ICD-9695
DiseasesDB4466
MeSHD004890

Erythema (from the Greek erythros, meaning red) is redness of the skin, caused by hyperemia of the capillaries in the lower layers of the skin. It occurs with any skin injury, infection, or inflammation.[1] Examples of erythema not associated with pathology include nervous blushes.[2]

Diagnosis[edit]

Erythema disappears on finger pressure (blanching), while 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]

Causes[edit]

It can be caused by infection, massage, electrical treatment, acne medication, allergies, exercise, solar radiation (sunburn), cutaneous radiation syndrome, niacin administration,[3] 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.

In about 30–50% of cases, the cause of erythema is unknown.[citation needed]

Circumoral erythema has been described as a typical sign of acute oleander poisoning by ingestion.[4]

May also be caused by Vitamin A toxicity.[5]

Exposure to jet fuels (Jet A, JP-8, JP-8+100) may cause a moderate to severe erythema.[6]

Associated conditions[edit]

See also[edit]

References[edit]

  1. ^ "erythema" at Dorland's Medical Dictionary
  2. ^ erythema, Mosby’s Medical, Nursing and Allied Health Dictionary, Fourth Edition, Mosby-Year Book 1994, p. 570
  3. ^ USA (2013-03-25). "[The niacin test in schizophrenia]. [Psychiatr Pol. 1990 Mar-Apr] - PubMed - NCBI". Ncbi.nlm.nih.gov. Retrieved 2013-09-05. 
  4. ^ "Nerium oleander L.(PIM 366)". Inchem.org. Retrieved 2013-09-05. 
  5. ^ Textbook of veterinary physiological chemistry, by Larry Engelking
  6. ^ USA (2002 Jun 14). "[Effect of jet fuels on the skin morphology and irritation in hairless rats.". Ncbi.nlm.nih.gov. 

External links[edit]