Eating too much watermelon will not directly lead to the development of diabetes, but it may become a triggering factor for diabetes. Diabetes is caused by a combination of genetic and environmental factors, in which dietary factors are also involved in the occurrence of diabetes, long-term consumption of foods high in sugar, salt, fat and calories will lead to obesity, which can easily induce diabetes. Watermelon belongs to a kind of fruit with high sugar content and high glycemic index. For ordinary healthy people, eating more watermelon at one time will generally not result in abnormally high blood sugar, but if you eat a lot of watermelon for a long time, it may lead to diabetes and cause abnormally high blood sugar. You should eat reasonably in your daily life, ensure dietary diversity, and consult a professional doctor or dietitian to develop an individualized diet plan if necessary.