Diabetes is a metabolic disorder caused by genetic factors, immune dysfunction, and other factors, leading to a series of metabolic disorders such as sugar, protein, and fat. Typical cases may show symptoms such as polyuria, polydipsia, polyphagia, and weight loss, known as the ’three pluses and one minus’ syndrome. Long-term adherence to standardized treatment is crucial, including: controlling diet, maintaining moderate exercise, rational medication use, reducing fat intake, and controlling dietary protein structure, which can have a good effect on improving blood glucose tolerance. Avoid spicy food and eat more fresh vegetables and fruits to supplement various vitamins. It is essential to treat with insulin injections.