Generally speaking, people who are abstaining from sugar can consume low-glycemic index fruits, such as apples, cherries and pears, in moderation or in small quantities. However, it is not recommended to consume large quantities of high glycemic index fruits such as watermelon. The effect of fruits on blood sugar needs to be determined according to the corresponding glycemic index, such as watermelon’s glycemic index of 72, belonging to the high glycemic index of food, large amounts of consumption may cause significant fluctuations in blood sugar, not conducive to sugar control. Foods with a low glycemic index, such as cherries, can be consumed in moderation or in small quantities, and generally do not cause dramatic fluctuations in blood sugar. For patients with diabetes or the presence of hyperglycemia who may need to control their blood sugar levels, a common method is through dietary modification and exercise regulation. In addition, glucose-lowering medications can be used to improve blood sugar conditions. It is recommended that people who need to control their blood sugar should seek medical attention in a timely manner and consult a medical professional to determine a specific plan for controlling their blood sugar.