Watermelon is known as the king of summer fruits, its shape, color, taste, juice and rich in nutrients, since ancient times, people love, Song Dynasty Wen Tianxiang had chanted “swallowed the fire and smoke, into the teeth will make the sound of ice and snow,” the poem praise of the wonderful use of watermelon to relieve the heat. As a “melon” crowd, today we will talk about the efficacy of watermelon and the precautions to eat watermelon. 1, the efficacy of watermelon Chinese medicine believes that watermelon is sweet and cold, has the efficacy of clearing heat, quenching thirst, diuresis and swelling. In the Yuan Dynasty, Wu Rui’s “Daily Herbal” pointed out that watermelon has a “summer heat, quenching thirst, broadening the lower gas, small water, treating blood dysentery”; the Yuan Dynasty Khu Sihui was in the “Drinking Meal” pointed out that in addition to the watermelon has a thirst quenching pain, there is a “cure for heartburn, detoxification of alcohol The Ming dynasty’s “Danxi Xinfa” describes the role of watermelon juice in treating mouth sores; the Ming dynasty’s Lan Mao tells in “Diannan Ben Cao” that watermelon can treat various feverish diseases. Modern research shows that the flesh of watermelon is more than 90% water, in addition to sugar, vitamins, various amino acids and a small amount of inorganic salts, which are most effective in replenishing water and nutrients needed by the human body during the high temperature season; watermelon is often used as a part of medicine. -Watermelon rind, modern pharmacological research found that it is rich in vitamins A, B, E, a variety of amino acids, as well as calcium, iron, phosphorus, zinc electrolytes. Therefore, in the summer time, a few mouthfuls of watermelon, can be described as refreshing, refreshing, refreshing heart, is a great benefit to the body and mind; if fever, thirst, urine, sweating, irritability and other symptoms after heatstroke, can also eat watermelon to carry out simple auxiliary treatment. But watermelon is good, but there are certain precautions when eating, here briefly and we talk about, so as not to damage the body. 2, eat melon to pay attention to the high summer temperatures, watermelon open too long is easy to spoil, breeding bacteria, eat the spoiled watermelon is often gastrointestinal inflammation. Therefore, eat watermelon should pay attention to the choice of ripe fresh watermelon. At the same time, watermelon must be washed, cut open with a clean knife to eat, do not wash the melon and knife on the cut, and do not eat by mosquitoes, flies and other crawling bites over the flesh of the melon, beware of disease from the mouth. In addition, although the hot day eat ice watermelon relief effect is very good, but chilled watermelon on the digestive tract stimulation is great, easy to cause damage to the digestive tract, especially for dental caries, dental allergies and gastrointestinal function is weak people should not eat ice watermelon. 3, special people eat melon to be cautious (1) watermelon is a cold product, eat too much easy to hurt the spleen and stomach Yang Qi, so the consumption of watermelon must not be excessive, so as not to damage the spleen and stomach, affecting the spleen and stomach transport; for the elderly and the spleen and stomach cold, indigestion, slippery stool should eat less or not eat appropriate, more food can occur after the abdominal distension, diarrhea, decreased appetite, but also accumulate cold and damp, leading to disease. (2) eat a lot of watermelon in a short period of time, can make the body more water, more than the body’s physiological capacity. Patients with cardiac and renal insufficiency, the body’s ability to regulate water is greatly reduced, too much water can lead to a sharp increase in blood volume increased, the heart, kidneys and other organs to increase the burden, easy to cause acute heart failure, acute renal failure and other diseases. Therefore, for patients with cardiac and renal insufficiency, remember not to eat too much watermelon. (3) Watermelon contains about 5% sugar, mainly glucose and fructose, which means that eating watermelon will lead to an increase in blood sugar. Normal people will secrete insulin in time, can make blood sugar, urine sugar to maintain at a normal level. But diabetic patients are different, eating too much watermelon in a short period of time, not only will blood sugar rise, the more serious condition may also lead to ketoacidosis, endangering the lives of patients. At the same time, the intake of too much sugar can also be converted into fat, causing obesity. Therefore, for diabetic and obese patients need to eat watermelon with caution.