Which skin condition is known for causing red, raised, and often itchy lesions?

Urticaria, also known as hives, is characterized by the presence of red, raised welts on the skin, accompanied by significant itching. The lesions are typically evanescent, meaning they can appear and resolve quickly, often within hours or days, and can change location on the body. Urticaria results from a hypersensitivity reaction and can be triggered by various factors, including allergens, medications, and stress.

The key features of urticaria include its wheal-and-flare appearance, which distinguishes it from other conditions. In contrast, psoriasis presents with well-defined, scaly plaques that are typically not itchy but can be associated with discomfort. Rosacea involves facial redness, flushing, and visible blood vessels, often affecting the central face but does not present with raised lesions or significant itching. Dermatitis, while it can also cause red and itchy skin, typically exhibits a different presentation involving inflammation and might include other features like scaling or crusting. The distinctive attributes of urticaria, particularly the urticated wheals and rapid course, make it the correct answer for this question.