T helper 2 (Th2)-mediated dermatoses are inflammatory skin diseases driven by CD4+ Th2 cells that produce interleukin (IL)-4, IL-5, IL-13, and IL-31, promoting immunoglobulin E (IgE) class switching, eosinophil recruitment, mast cell degranulation, and pruritus. Here, IL4 is linked to inflammatory skin disease.