Icing sugar can cause blood sugar to rise. Iced sugar contains a large amount of sugar and calories, its glycemic index is high, the sugar rises faster, after eating iced sugar will cause an increase in blood sugar. Therefore, for patients who need to control blood sugar, it is not recommended to eat icing sugar, so as not to cause large fluctuations in blood sugar, which is not conducive to the stabilization of blood sugar. In addition to icing sugar, other sugary foods, such as milk tea, chocolate, cakes, cookies, etc., diabetic patients are not recommended to eat, may lead to increased blood sugar. In daily life, patients with diabetes should maintain a low-sugar, low-fat diet, appropriate jogging, swimming and other exercise, standardized use of insulin or metformin and other oral hypoglycemic drug therapy, pay attention to monitoring blood glucose, and promptly go to the hospital in case of discomfort.