The exact cause of type 2 diabetes has not been elucidated yet. Common causes include hereditary factors, environmental factors, autoimmunity, etc., which can cause insufficient insulin secretion or insensitivity of the body to insulin, resulting in ineffective utilization and storage of glucose in the blood. Current clinical treatments mainly include changing dietary habits, exercise therapy and drug therapy. 1. Causes of type 2 diabetes (1) Genetic factors: type 2 diabetes has a relatively obvious family history. (2) Environmental factors: they are particularly important in the development of type 2 diabetes, mainly including maintaining a poor lifestyle for a long time, such as overeating, over-nutrition and lack of proper exercise. (3) Autoimmunity: Under the action of genetic and environmental factors, the immune system launches an attack on pancreatic islet cells, i.e. autoimmunity, leading to insufficient or lack of insulin secretion. 2. Treatment of type 2 diabetes (1) Changing dietary habits: Reduce sugar intake as much as possible, control total calories, and reasonably distribute nutrients in each meal. (2) Exercise therapy: choose suitable exercise under the guidance of doctors, mainly low-intensity exercise, such as square dance, aerobics and jogging. (3) Drug therapy: If the effect of conventional treatment is not good, you can apply hypoglycemic drugs under the guidance of a doctor to avoid unauthorized blind use of drugs. In conclusion, once diagnosed with type 2 diabetes, you should actively deal with it, go to the hospital in time, and make personalized treatment plan under the guidance of the doctor. In daily life, we should pay attention to maintain good living and eating habits, do a good job of self-monitoring and regular review.