What condition is characterized by redness of the skin?

The condition characterized by redness of the skin is erythema. Erythema results from an increase in blood flow to the capillaries in the skin, often due to inflammation, infection, or irritation. It is prominent in various circumstances, such as sunburn or allergic reactions, and can be a vital indicator in clinical settings, helping healthcare providers assess underlying conditions.

Dermatitis, while it can involve redness, encompasses broader inflammation that may not exclusively present as erythema. Edema refers to swelling caused by fluid retention, and necrosis involves tissue death, which typically doesn't involve redness as a primary characteristic. Erythema stands out as the most direct and specific term for skin redness.