What skin condition is characterized by raised, itchy welts on the skin?

The skin condition characterized by raised, itchy welts on the skin is urticaria. Urticaria, commonly known as hives, results from an allergic reaction or other triggers such as stress, certain foods, or medications. This condition is defined by its acute onset of raised welts, which can vary in size and may disappear and reappear quickly, often accompanied by intense itching. The wheals of urticaria can occur anywhere on the body and usually resolve within 24 hours if not re-triggered.

In contrast, psoriasis presents as thick, red patches covered with silvery scales and is often associated with chronic inflammation rather than immediate welts. Eczema, or atopic dermatitis, involves dry, itchy skin and typically leads to scaling and redness rather than distinct welts. Rosacea primarily affects the face with flushing, redness, and visible blood vessels; it does not produce raised, itchy welts like urticaria does. Thus, urticaria is distinctly characterized by the acute, raised welts and intense pruritus (itchiness) that separate it from these other skin conditions.