Patients with diabetes mellitus can be regulated by medical nutrition therapy, exercise therapy and medication to lower blood sugar. 1. Medical nutrition therapy: the total daily calorie requirement needs to be formulated according to the patient’s weight, activity level, age and other factors, avoiding high-fat and high-sugar foods, such as cakes, milk tea, animal offal, fatty meat, fried foods and so on. 2. Exercise therapy: Obese diabetic patients should also carry out appropriate exercise, such as swimming, jogging, jumping rope, climbing, etc., and it is recommended that each exercise time is more than 30 minutes. 3. Medication: patients with type 1 diabetes can use insulin injection therapy, patients with type 2 diabetes can first consider taking oral hypoglycemic drugs, such as acarbose, metformin, etc., if oral hypoglycemic drugs can not control blood glucose well can use insulin therapy. Patients diagnosed with diabetes should be treated under the guidance of a doctor.