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erythema Line breaks: ery|thema
Pronunciation: /ˌɛrɪˈθiːmə/

Definition of erythema in English:


[mass noun] Medicine
Superficial reddening of the skin, usually in patches, as a result of injury or irritation causing dilatation of the blood capillaries.
Example sentences
  • Local irritation, erythema, ulceration, and tenderness were common reactions.
  • Early application of topical steroids is useful to limit erythema and pruritus.
  • The only adverse effects of therapy were transient skin erythema and local hair loss in three irradiated patients.


Example sentences
  • Clinical studies have shown no difference in the erythemal response to ultraviolet radiation between children and adults.
  • A depletion of the ozone column by 25% could increase the erythemal exposure of field scientists or indigenous arctic people by approximately 40% during the spring.
  • At 24 hours after irradiation, sites were visually assessed to determine the minimal erythemal dose, i.e. the lowest dose at which erythema was perceptible.
Example sentences
  • Seborrheic dermatitis causes scaly erythematous skin lesions most often found in nasolabial folds and eyebrow areas.
  • Infections such as mastitis and cellulitis tend to be erythematous, tender, and warm to the touch; they may be more circumscribed if an abscess has formed.
  • Thrush and erythematous candidiasis are common in patients with immune defects and are often an early manifestation of the immunodeficiency.


Late 18th century: from Greek eruthēma, from eruthainein 'be red', from eruthros 'red'.

Definition of erythema in:
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