Patients with high blood sugar are not recommended to eat bananas. Because the glycemic index of bananas and other fruits is relatively high, if patients with high blood sugar consume bananas, it will cause a sharp rise in blood sugar in a short period of time, causing fluctuations in blood sugar. Therefore, patients with high blood sugar are not recommended to eat fruits with a high glycemic index such as bananas, and are recommended to use fruits with a low glycemic index, such as kiwis, grapefruits with white hearts, apples, etc. It is recommended to eat fruits at 1/3 or 1/2 each time, and the time to eat fruits is recommended to add a certain amount of fruits between two meals when blood sugar is stable. After eating fruits, blood sugar should be monitored. If fruits cause a sharp rise in blood sugar, it is recommended that similar fruits should not be used in the future, and the adjustment of glucose-lowering drugs and programs should be carried out under the guidance of a professional physician.