Diabetes is caused by a combination of genetic and external factors, not by contact transmission, so people with diabetes can share dishes with family members. Diabetes mellitus, caused by defects in insulin secretion and/or action, is a group of metabolic disorders characterized by chronic elevation of blood glucose caused by a variety of etiologies. Diabetes is not an infectious disease and is not contagious. The etiology and pathogenesis of diabetes are not clear, but the incidence and prevalence of diabetes and the number of diabetic patients have increased significantly in recent years, not because of person-to-person transmission, and may be related to changes in people’s lifestyles and the rise in obesity rates, etc., and thus diabetic patients do not need to use separate dishes from their families. People with diabetes should consult a medical professional for consultation.