IL22 and autoimmune disease: Its original name was IL‐10‐related T cell–derived inducible factor (IL‐TIF), and it was discovered in 2000 as a new member of the IL‐10 family of cytokines.23 Various types of cells produce IL‐22, including Th17, Th22, and NK cells, and group 3 innate lymphoid cells (ILC3s).24, 25, 26, 27 Recently, increasing evidence has indicated that IL‐22 plays diverse roles in the pathogenesis of autoimmune diseases, including pathogenic and protective processes.