Milk and watermelon are common and popular drinks and fruits in daily life, and in general watermelon and milk can be consumed in moderation at the same time. Watermelon is cool in nature, most of the substance is water, and some vitamins, eaten in moderation can replenish a certain amount of water, and also the effect of heat relief, diuretic. Milk contains protein, vitamins and other nutrients needed by the human body, watermelon and milk can be eaten together in moderation to supplement human nutrition, the nutrients in the body usually do not conflict, and generally will not have adverse effects on the body. If the two eat together after the symptoms of discomfort, may be part of the population itself has lactose intolerance (i.e. the lack of lactose digestion enzymes in the body), after drinking milk will appear abdominal pain, diarrhea and other symptoms, it is recommended that this type of people to a small amount or avoid eating milk. It is also possible that some people have a weak gastrointestinal tract, eat chilled watermelon or watermelon eating too much, the stomach and intestines are stimulated thus appearing bloating, abdominal pain, diarrhea, so people with a weak gastrointestinal tract should eat a small amount and avoid eating chilled watermelon. Because the sugar in watermelon is mostly fructose, sucrose, into the body is more easily absorbed, eat a lot of watermelon is easy to make blood sugar rise, so diabetic people should eat a small amount under the guidance of a doctor to avoid aggravating the disease.