Whether or not you can eat watermelon during glycemic control mainly depends on blood sugar control. Blood sugar control is stable, generally do not recommend eating a lot of watermelon; blood sugar control is not stable, do not recommend eating watermelon. 1. Stable blood sugar control: a small amount of watermelon will not lead to dramatic fluctuations in blood sugar, but we must pay attention to control the amount of food, because watermelon is relatively high in sugar content, the glycemic index is relatively large, so it is not recommended to eat a lot of watermelon. 2. Unstable blood sugar control: it is not recommended to eat watermelon, because the sugar in watermelon will enter the bloodstream in a large amount in a short period of time, which may lead to an increase in blood glucose, resulting in poor blood sugar control and further aggravation of the condition. Diabetic patients should have strict dietary control during glycemic control, especially pay attention to reducing the intake of high-sugar and high-fat foods, and regularly test the blood sugar situation. It is recommended that diabetic patients with abnormal blood glucose should seek prompt medical attention and standardized treatment under the guidance of clinicians.