If your blood sugar is still high after insulin injection, it may be that your blood sugar is too high and the dose of insulin injected is not enough, so you can inject insulin again, change the type of insulin or supplement oral hypoglycemic drugs. 1. Re-inject insulin, change the type of insulin: If the blood sugar is too high, and the blood sugar is still high after injecting insulin, you can re-inject a certain dose of insulin or change the type of insulin under the guidance of a professional doctor, so as to control the blood sugar value within the normal range. 2. With oral hypoglycemic drugs: If the blood sugar is still high after insulin injection, you can take hypoglycemic drugs, such as metformin, under the guidance of a professional doctor to lower the blood sugar and keep the blood sugar value at a more stable level. If the blood sugar is still high after insulin injection, you should also adjust your diet, eat less or no food with high sugar content, such as starchy food, sweet food, etc., and strictly follow the doctor’s instructions to inject the correct dose of insulin, change the type of insulin or take hypoglycemic drugs.