Common high-sugar fruits include watermelon, lychee, longan and pineapple. High-sugar fruits generally refer to fruits with a high glycemic index, and blood sugar rises faster after eating them. For patients with high blood sugar, the intake of such fruits should be reduced so as not to cause blood sugar fluctuations, which is not conducive to the control of blood sugar. Common high-sugar fruits include watermelon, lychee, longan, pineapple, fresh jujube and so on. In daily life, diabetic patients should also avoid eating cakes, milk tea, chocolate and other high-sugar foods. Common low-sugar fruits include apples, avocados, cherries, grapefruit, oranges, peaches, grapes, papaya, etc. They are suitable for patients with high blood sugar and are recommended to be eaten between meals. Patients diagnosed with high blood sugar should actively cooperate with doctors for treatment and maintain a healthy diet.