Diabetes mellitus is mostly caused by environment, heredity and other reasons. Patients can lower sugar by controlling diet, proper exercise and applying drugs. 1. Diet control: diabetic patients should pay attention to the control of diet, calculate the total calorie intake of daily food, avoid excessive calorie intake, and at the same time to achieve nutritional balance, rational allocation of nutrients, small meals. 2. Appropriate exercise: diabetic patients usually need appropriate exercise, such as jogging, playing badminton, etc., can increase the sugar metabolism, thus playing a role in lowering sugar. 3. Application of drugs: diabetic patients can also take metformin, Repaglinide, acarbose and other drugs under the guidance of the doctor, which has a better effect on lowering sugar. Diabetic patients should also regularly monitor blood glucose, if there is a rise in blood glucose, should be timely medical examination and treatment.