Diabetes mellitus is a group of metabolic disorders characterized by chronic hyperglycemia caused by multiple etiologies. It is caused by defective insulin secretion and/or action, and is a clinical syndrome caused by a complex etiology of genetic and environmental factors. Diabetes is classified into type 1 diabetes mellitus (T1DM), type 2 diabetes mellitus (T2DM), other specific types of diabetes mellitus, and gestational diabetes mellitus, of which T2DM is the most common, accounting for about 90%-95%. The basic clinical manifestation of diabetes is a metabolic disorder syndrome: the typical manifestation of “three more and one less”, such as drinking more, urinating more, eating more and losing weight, which may also be accompanied by itchy skin, blurred vision and other complications. In terms of treatment, the five key points of comprehensive diabetes management are diabetes education, medical nutrition therapy, exercise therapy, blood glucose monitoring and medication. Early diabetic patients mainly control blood glucose through exercise and diet management, but if blood glucose is not well controlled or other complications appear, they need to go to the hospital in time, carry out medication under the guidance of doctors, monitor blood glucose regularly, review and adjust medication in time. Adjust the medication. You can’t blindly believe in the so-called prescriptions, making your condition worse and delaying the best time for treatment.