Definition

1. Noun:
   • Abnormal redness of the skin: A medical term for redness of the skin caused by increased blood flow in the superficial capillaries. It occurs in response to injury, infection, or inflammation.

Usage

• Erythema is a clinical sign, not a disease itself. It is used to describe the visible symptom of redness.
• It is typically used in medical, dermatological, and scientific contexts.
• Example:

Examples

Advanced Usage

• Descriptive Terms: Erythema is often modified by specific terms to describe its pattern, cause, or appearance in medical diagnoses.
  • Erythema migrans is the characteristic rash of Lyme disease.
  • Erythema multiforme is a type of hypersensitivity reaction.
  • Erythema nodosum presents as tender red nodules, usually on the shins.

Variants and Related Words

• Erythematous (adjective): Relating to or characterized by erythema.
  • The patient has an erythematous rash on the torso.

Synonyms

• Redness: A general, non-medical term for the same appearance.
• Flushing: Often used for temporary redness, especially of the face, due to emotion, heat, or alcohol.
• Rubor: A technical, chiefly historical medical term for redness, especially due to inflammation.

Antonyms

• Pallor: Unnatural lack of color in the skin.
• Cyanosis: A bluish discoloration of the skin due to poor circulation or inadequate oxygenation of the blood.

Related Medical Concepts

• Inflammation: A biological response to harmful stimuli, of which erythema (redness) is one of the four cardinal signs, along with heat, swelling, and pain.
• Vasodilation: The widening of blood vessels, which is the direct physiological cause of erythema.

Noun

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