Watermelon is one of the more popular fruits in the summer, especially in the hot summer after chilling. If the watermelon is not cut open in the refrigerator for 3 days, it is possible to take out and continue to eat. If the watermelon is cut open in the refrigerator for 3 days is not recommended to eat. Not cut when the watermelon inside in a completely closed state, generally will not be affected by external bacteria, and refrigerator refrigeration temperature is relatively low, not easy to deteriorate, from the refrigerator can still be eaten. But it is best not to eat directly out of the chilled watermelon, too cold food may lead to gastrointestinal discomfort. Have cut the watermelon in the refrigerator for 3 days will have bacterial contamination, most of the bacteria from cutting the watermelon knife and air, even in the refrigerator refrigeration will still occur certain deterioration, at this time is not recommended to eat. Watermelon is rich in water, sugar and trace elements is a playground for bacterial growth, cut in room temperature watermelon can be stored for up to 6 hours. If more than 6 hours in the watermelon bacteria content will be very high, consumption will find watermelon sour, may appear abdominal pain, diarrhea, nausea and other gastrointestinal symptoms, and in serious cases, even toxic reactions. When these symptoms occur, it is recommended to go to the hospital in a timely manner, do not self-medication, so as not to delay the disease. If you can’t finish the watermelon after opening it, you can juice it and make derivatives such as ice lollies, smoothies and drinks. This will prevent the watermelon from being wasted and make the watermelon taste better for consumption.