You can't eat grapes if your blood sugar is high. Grapes contain a lot of glucose, which will lead to a sharp rise in blood sugar, so diabetics can't eat grapes. The fruits that diabetics can't eat are bananas, oranges, oranges, watermelons and other foods. These foods contain a lot of glucose, which will lead to the increase of patients' blood sugar. People with diabetes can eat figs, pitaya, apples, pomegranates, cucumbers, tomatoes, pineapples and other foods. However, the premise is that these foods will cause blood sugar to rise more or less, but the glycemic index is relatively low, and the impact on blood sugar is not particularly great. Eat in moderation, and don't eat a lot just because it has little effect on blood sugar.