What Causes Random Red Itchy Welts to Appear on the Skin?
1. Introduction Random red, itchy welts on the skin, clinically known as urticaria or hives, are primarily caused by the sudden release of histamine from mast cells in the dermal layer. This localized immune response can be triggered by allergic reactions, environmental factors, physical stimuli, or underlying autoimmune conditions. Understanding the biochemical cascade of histamine … Read more