People with diabetes can die if left untreated, especially type 1 diabetes. type 1 diabetes is diabetes caused by an absolute deficiency of insulin and requires lifelong treatment with insulin. if left untreated, or if insulin treatment is interrupted at will during treatment, it can cause acute complications of diabetes, such as ketoacidosis. It has been reported that before the discovery of insulin, the mortality rate of type 1 diabetes due to acute complications reached more than 90%, and the effective use of insulin to treat diabetes, the life expectancy of type 1 diabetic patients is significantly longer and can resemble that of a normal person. the same is true for type 2 diabetes, and if it reaches a severe level, acute diabetic complications, such as ketoacidosis, more commonly seen in the diabetic hyperosmolar state or diabetic hyperosmolar coma, which can also lead to death. Even when acute complications do not occur, chronic complications of diabetes, such as diabetic retinopathy, diabetic nephropathy, and diabetic foot infections, can affect life expectancy and lead to death.