Erythema (, ) is redness of the skin or , caused by hyperemia (increased blood flow) in superficial capillaries.
Types
Causes
It can be caused by
infection,
massage, electrical treatment,
acne medication,
allergy, exercise, solar radiation (
sunburn), photosensitization,
acute radiation syndrome, mercury toxicity,
,
[ Vesicant EFFECTS] niacin administration,
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
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.
See also
-
Hyperemia
-
Flushing (physiology)
-
List of cutaneous conditions
External links
