Diabetes is not contagious to a spouse, but living together with a poor lifestyle, such as a high-sugar diet and lack of exercise, may lead to a relatively higher risk of developing diabetes. Diabetes is not an infectious disease and is not contagious. Diabetes mellitus is a group of metabolic disorders characterized by chronic increases in blood glucose, caused by defective insulin secretion or defective action due to a decline in pancreatic islet cell function. The causes of diabetes are complex and are related to genetic, environmental and autoimmune factors. Diabetes is not contagious to your spouse, but living with a poor lifestyle may lead to a relatively higher risk of developing diabetes. For example, long-term intake of high-sugar, high-calorie food, sedentary, lack of exercise, alcohol abuse and so on. It is recommended that diabetic patients seek medical attention in a timely manner, usually pay attention to a reasonable diet, appropriate exercise, smoking cessation and alcohol restriction, and a relaxed mood.