Classification and external resources

Characteristic "bull's eye" rash (erythema migrans) of early Lyme disease
ICD-10 L51-L54
ICD-9 695
DiseasesDB 4466
MeSH D004890

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]



Erythema disappears on finger pressure (blanching), while purpura or bleeding in the skin and pigmentation do not. There is no temperature elevation in erythema, unless it is associated with the dilation of arteries in the deeper layer of the skin.[citation needed]


It can be caused by infection, massage, electrical treatment, acne medication, allergies, exercise, solar radiation (sunburn), cutaneous radiation syndrome, 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.[1]

May also be caused by Vitamin A toxicity. [3]

Associated conditions

See also


  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. ^ Textbook of veterinary physiological chemistry, by Larry Engelking

External links

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Look at other dictionaries:

  • erythema — [er΄i thē′mə] n. [ModL < Gr erythēma < erythainein, to redden, blush < erythros, RED] an abnormal redness of the skin caused by various agents, as sunlight, drugs, etc., that irritate and congest the capillaries erythemic [er΄i thēmik]… …   English World dictionary

  • Erythema — Er y*the ma, n. [NL., fr. Gr. ?, fr. ? to redden, fr. eryqro s red.] (Med.) A disease of the skin, in which a diffused inflammation forms rose colored patches of variable size. [1913 Webster] …   The Collaborative International Dictionary of English

  • Erythēma — (gr., Hautröthe, Med.), 1) niederer Grad der Rose, mehr durch äußere Reize erzeugt; 2) rosenartiger, doch mehrfleckiger Ausschlag; davon: Erythematisch …   Pierer's Universal-Lexikon

  • erythema — medical Latin, from Gk. erithema, from erythainein to become red. Related: Erythematous …   Etymology dictionary

  • erythema — erythematic /er euh thi mat ik/, erythematous /er euh them euh teuhs, thee meuh /, erythemic, erythemal, adj. /er euh thee meuh/, n. Pathol. abnormal redness of the skin due to local congestion, as in inflammation. [1760 70; < NL < Gk, equiv. to… …   Universalium

  • Erythema — Erythem bei einer Lyme Borreliose Erythem (Erythema, von altgriechisch ἐρύθημα (erýthema) „Röte“, „Entzündung“[1]) ist ein dermatologischer Ausdruck für eine Hautrötung bedingt durch eine Mehrdurchblutung auf dem Boden einer Gefäßerweiterung und… …   Deutsch Wikipedia

  • Erythema — A redness of the skin resulting from inflammation, for example, as caused by sunburn. * * * Redness due to capillary dilation. [G. e., flush] e. ab igne a reticulated, pigmented, macular eruption that occurs, often on the shins, in bakers,… …   Medical dictionary

  • erythema — n. flushing of the skin due to dilatation of the blood capillaries in the dermis. It may be physiological or a sign of inflammation or infection. Erythema nodosum is characterized by tender bruiselike swellings on the shins and is often… …   The new mediacal dictionary

  • erythema — noun Etymology: New Latin, from Greek erythēma, from erythainein to redden, from erythros Date: circa 1783 abnormal redness of the skin due to capillary congestion • erythematous adjective …   New Collegiate Dictionary

  • erythema — noun a) Abnormal redness and inflammation of the skin, due to vasodilation. b) Skin redness from sunburn or chemical irritation See Also: erythrocyte, erythrophobia, erythronium …   Wiktionary

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