Hello, are you a little fat? Some obese people will have insulin resistance, that is, they are not sensitive to insulin. Metformin has a certain weight loss effect. But you should also increase exercise and improve the effect of insulin. You can also switch to short-acting insulin hypoglycemic R before meals and to medium-acting insulin hypoglycemic N before going to bed, four times a day. Basically control blood sugar, the more injections, the better the control effect.