You can eat watermelon after a meal, but it is best to interval about half an hour. After the food enters the stomach, the stomach will neutralize the food with digestive juices through peristalsis, stirring and squeezing, which can make the food better digested and decomposed, which is conducive to the intestinal tract to absorb the nutrients therein. The watermelon water content is relatively large, and at the same time has a thirst-quenching, diuretic and antihypertensive effect. Eat watermelon immediately after a meal will lead to a large amount of water, into the digestive system, and even dilute the digestive juices, affecting the stomach on the food digestion process, often eat watermelon immediately after a meal, and even cause indigestion. After eating the human stomach has been in a state of overexpansion, then eat watermelon, will lead to the degree of expansion of the stomach increased, long-term down easy to induce gastric prolapse. After the meal want to eat watermelon, should try to interval of about half an hour, when the stomach food has basically been digested, then eat watermelon will not affect the food digestion time, but also to avoid gastric prolapse.