Eating watermelon is glycemic. The glycemic index of watermelon is 72, which is a high glycemic index food, so eating watermelon is glycemic. Watermelon into the intestinal tract after digestion fast, good absorption, glucose can quickly enter the bloodstream, easy to cause elevated blood sugar. Watermelon contains a lot of water, carotene, potassium, phosphorus and other nutrients, every 100 grams of watermelon contains 93.3g of water, 450.0mg of carotene, 87mg of potassium, 9mg of phosphorus, a small amount of food can help supplement the body’s nutrients. However, the sugar content of watermelon is about 5%, which is equivalent to about 5g of sugar per 100g of watermelon. Therefore, diabetic and hyperglycemic patients can eat small amounts under the guidance of a doctor when their blood sugar is well controlled. For knowledge of healthy diet for diabetic patients, consult a professional nutritionist and eat reasonably under the guidance of a physician.