In fact, diabetic patients can eat watermelon in moderation, because the sugar content of watermelon is not very high, and the sugar content of watermelon is generally 4%-5%, because most of it is water, so eating watermelon in moderation will not lead to too much change in blood sugar level. However, we need to control our food intake. After all, watermelon is rich in glucose, sucrose and other sugars that can easily lead to an increase in blood sugar levels.