Erythema vs. Redness — What's the Difference?

Erythema (from the Greek erythros, meaning red) is redness of the skin or mucous membranes, caused by hyperemia (increased blood flow) in superficial capillaries. It occurs with any skin injury, infection, or inflammation.

The hue of the long-wavelength end of the visible spectrum, evoked in the human observer by radiant energy with wavelengths of approximately 630 to 750 nanometers; any of a group of colors that may vary in lightness and saturation and whose hue resembles that of blood; one of the additive or light primaries; one of the psychological primary hues.

Redness of the skin caused by dilatation and congestion of the capillaries, often a sign of inflammation or infection.

A pigment or dye having a red hue.

Abnormal redness and inflammation of the skin, due to vasodilation.

Something that has a red hue.

Skin redness from sunburn or chemical irritation

Often Red A Communist.

A disease of the skin, in which a diffused inflammation forms rose-colored patches of variable size.

A revolutionary activist.

Abnormal redness of the skin resulting from dilation of blood vessels (as in sunburn or inflammation)

The condition of being in debt or operating at a loss

Having a color resembling that of blood.

Reddish in color or having parts that are reddish in color

Having a reddish or coppery skin color.

Often Red Often Offensive Of or being a Native American.

Having a ruddy or flushed complexion

Relating to or being a red state.

Often Red Communist.

(uncountable) The state or quality of being red.

A red discoloration, especially of skin.

The quality or state of being red; red color.

A response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat

The quality or state of the chromatic color resembling the hue of blood