However, depending on the context, "erythema" can be used with prefixes to specify the cause or location of the redness:
* Photo-erythema: Redness caused by sunlight exposure.
* Toxic-erythema: Redness caused by a toxin.
* Facio-erythema: Redness of the face.
* Palmo-erythema: Redness of the palms.
The prefix will vary depending on the specific type of erythema being described.