What type of inflammation is characterized by redness, itching, and swelling?

The correct answer is dermatitis because it specifically refers to inflammation of the skin that manifests with symptoms such as redness, itching, and swelling. Dermatitis encompasses a range of conditions, often triggered by allergens, irritants, or other environmental factors, leading to an inflammatory response in the skin. This response results in various symptoms, primarily noticeable redness due to increased blood flow, itching driven by nerve endings exposed to inflammatory mediators, and swelling caused by fluid accumulation in the affected tissues.

In contrast, psoriasis is a chronic skin condition characterized by thickened, scaly patches and is often not associated with the same immediate inflammation or itchiness as dermatitis. Eczema, while it may appear similar, is generally considered a type of dermatitis that often involves oozing and crusting, but dermatitis is a broader term that includes various inflammatory skin reactions. Acne primarily involves the blockage of hair follicles and is not characterized by the same inflammatory symptoms as dermatitis.