Watermelon can be considered a low-sugar fruit with low sugar content. Although watermelon tastes sweeter, it contains a lot of water. However, its glycemic index is high, after eating it rises in sugar faster, people with high blood sugar should control the amount of consumption. Usually we divide the sugar content of fruits into three categories. The first category is fruit with a sugar content of less than 10%, which is also known as low sugar content fruit. The second is fruits with sugar content between 10% and 20%, which are medium sugar content fruits. The third type is those containing more than 20% sugar known as high sugar content fruits. For diabetic patients, eating some watermelon in moderation between meals will have little effect on blood sugar when blood sugar control is stable. It is recommended to eat watermelon between meals, and it is best not to juice it. Patients with high blood sugar should pay attention to monitoring blood sugar on a daily basis to prevent large fluctuations in blood sugar.