Watermelon is good, but you should also pay attention to eating watermelon. Chinese medicine experts believe that watermelon belongs to cold food and is easy to hurt the spleen and stomach. Therefore, people with spleen and stomach weakness, chronic enteritis, gastritis and duodenal ulcer or loose stool had better eat less. If diabetics eat too much, it will aggravate their condition; People with weak body and cold stomach will have symptoms of abdominal distension, diarrhea and loss of appetite if they eat too much; Patients with congestive heart failure and chronic kidney disease, after eating too much, will increase the burden on the heart and kidneys due to the sharp increase in water; People with oral ulcers eat too much, which will aggravate the degree of ulcers because of the cold watermelon. If you put watermelon in the refrigerator, it is even less suitable for the above patients. People who are weak before the summer solstice and after beginning of autumn are not suitable for eating. Normal people should not eat more, otherwise it will damage the spleen and stomach and cause indigestion or diarrhea. Watermelon should not be eaten with greasy things; If watermelon is eaten with warm food or drink, cold and heat are incompatible and it is easy to make people vomit. It should be reminded that patients with cold and fever in summer often turn to watermelon to replenish water and reduce fever, but because it belongs to sweet and cold food, it is not suitable for colds and early colds, especially those with symptoms such as chills and no sweat.