What is the term for scratching that causes welts on the skin?

The term "urticaria" refers specifically to the condition known as hives, which is characterized by raised welts on the skin caused by an allergic reaction or other irritants. When scratching occurs, it can lead to the release of histamines in the body, which disrupts the normal function of skin cells and results in the formation of these itchy welts.

Dermatitis generally describes inflammation of the skin that can result from various factors, including allergens, irritants, or other underlying conditions. While it can cause welts, it's more encompassing and not strictly defined by the occurrence of welts from scratching.

Psoriasis is an autoimmune condition that leads to the rapid growth of skin cells, forming thick, scaly patches that may look red and inflamed but is not primarily characterized by welts due to scratching.

Eczema is often a broader term that includes various types of dermatitis, typically marked by itchy, inflamed skin. It can have similarities to urticaria but does not specifically denote the welts resulting from scratching as a central feature.

Understanding that urticaria specifically refers to hives provides clarity about its distinct characteristics in the realm of dermatological conditions.