Watermelon is cold and sweet. After watermelon is cut and frozen for a long time, a film is formed on the surface of the pulp, cold air is absorbed by the pulp, and the water in the pulp becomes frost. Doctors believe that when people eat "ice" watermelon, the throat cavity, tongue taste bud nerve and tooth nerve inside the mouth will be numb due to cold stimulation, so they can't "taste" the sweetness and attractive "sand" taste of watermelon. It can also irritate the throat and cause problems such as pharyngitis or toothache. In addition, eating frozen watermelon often will damage the stomach, endanger the metabolism of gastric acid, make loss of appetite and lead to indigestion. Especially the elderly absorb hyperthyroidism, which is easy to cause digestive tract diseases such as loss of appetite, abdominal pain and diarrhea after eating.

Therefore, watermelon is not suitable for eating after freezing, and it is best to buy it now and eat it now. If the temperature of watermelon is high and needs to be cooled, you can put the watermelon in the refrigerator to cool down, and the temperature should be adjusted to 15℃. Watermelon should not stay in the refrigerator for more than two hours. Only in this way can we prevent heatstroke at high temperature without hurting the spleen and stomach, and we can also taste the sweetness of watermelon.

Effect of eating watermelon regularly on children aged 10.

Eating watermelon often may have an impact on children's health. Watermelon contains a lot of water. Excessive intake will dilute gastric acid, which is likely to endanger the metabolism of gastric juice and may also cause gastrointestinal dysfunction. Children's bodies are in the main stage of development, so the application of calcium and zinc supplements under the guidance of doctors can promote bone development, alleviate the symptoms of short stature, and keep adequate sleep at ordinary times.

In hot weather, children eating watermelon has the effect of strengthening the spleen, appetizing and removing fire. Watermelon is delicious, but you can't eat more. Because watermelon is a cold food, eating too much is very easy to hurt the spleen and help dampness. Children with indigestion should master the proportion of watermelon, otherwise it will easily cause abdominal pain or diarrhea. At the same time, watermelon should not be eaten too much at a time, otherwise it will dilute gastric acid and cause indigestion.

Chinese medicine believes that watermelon is cold and belongs to cold food. Eating too much will hurt the spleen and help damp. Especially the following people should not eat more:

Deficiency of qi and blood, weakness of spleen and stomach, loose stools and indigestion will lead to flatulence, diarrhea and loss of appetite.

People with poor gastrointestinal function, frequent urination and excessive nocturnal emission should not eat more watermelons.

The ability of patients with nephrotic syndrome to regulate water is reduced because of their renal function. In a short period of time, if they eat a lot of watermelons, the water in their bodies will increase and they will not be excreted on time, which will greatly increase the blood flow and be detrimental to the cardiovascular system.

Most patients with gum swelling and pain belong to yin deficiency and fire flourishing, and the diuretic effect of watermelon will aggravate the symptoms of yin deficiency and fire flourishing, leading to aggravation of ulceration.