Patients with diabetes should follow medical advice and standardized treatment. Untreated diabetes may cause diabetes-related clinical manifestations and complications, such as diabetic nephropathy, diabetic retinopathy, etc., which will seriously affect the patient’s daily life and even shorten the patient’s life expectancy. Patients diagnosed with diabetes mellitus can survive for a long time after stabilizing their blood glucose control through standardized treatment, and even their life expectancy will not be affected; however, if the treatment is not standardized, it may lead to long-term poor control of blood glucose, and then diabetic symptoms such as polydipsia, polyphagia, polyuria, and weight loss may occur, which will affect the patient’s daily life. In addition, it may also induce various complications, such as diabetic foot, diabetic nephropathy, diabetic retinopathy, etc., all of which are more serious complications, and if the condition is serious, it will shorten the patient’s life expectancy, and even threaten the patient’s life safety. Patients diagnosed with diabetes should actively cooperate with doctors for treatment, which is conducive to improving the prognosis.