Patients with high blood sugar can eat appropriate coarse grains to replace refined rice, refined noodles, for the control of blood sugar is better. Millet, corn, black rice and other coarse grains are rich in carbohydrates, dietary fiber, protein and other nutrients, of which dietary fiber can slow down the digestion of carbohydrates in the stomach and intestines, reduce the time of sugar in food into the bloodstream, and ultimately play a role in controlling blood glucose. Moreover, the glycemic index of coarse grains is lower than that of refined rice and noodles, so patients with high blood sugar can eat corn, millet porridge, oatmeal and other foods appropriately to replace refined carbohydrates such as rice and pasta, which can help control blood sugar. Patients diagnosed with hyperglycemia should actively cooperate with doctors for treatment, and do a good job of managing their diet and monitoring their blood glucose.