Eating watermelon in the evening, the frequency of urination is mainly watermelon contains a lot of water and sugar caused. Eating watermelon after the increase in urination is a normal physiological phenomenon, because watermelon contains more sugar and water and has a diuretic effect, so eating watermelon has to promote the role of urination, is one of the fruits of the summer. Therefore, after eating watermelon, the number of times you urinate will increase accordingly, and eating watermelon at night will also lead to an increase in urination; however, watermelon is high in sugar, and diabetic patients are generally not recommended to eat a large amount of watermelon; and it is not advisable to eat a large amount of watermelon in order to prevent abdominal pain, diarrhea and other digestive discomforts.