The decision of whether it is better to take medication or injections for high blood sugar should be made based on the specific blood sugar level, the condition of complications, the condition of pancreatic islet function, and the presence of abnormal liver and kidney function. For patients with type 1 diabetes and type 2 diabetes with poor islet function, insulin must be chosen for glucose-lowering treatment. For patients with abnormal liver and kidney function, heavy chronic complications and high blood glucose level, they must also first consider applying insulin for glucose-lowering treatment, while for type 2 diabetes patients with no abnormal liver and kidney function and good islet function, they can first choose oral hypoglycemic drugs for glucose-lowering treatment or choose insulin combined with oral hypoglycemic drugs for glucose-lowering treatment. Whether taking medicine or insulin, good results can be achieved only on the basis of controlling diet and strengthening exercise.