In fact, it can be said that when fire was invented in ancient times, hot water was born, but it was not popularized. During the Song and Yuan Dynasties, folk tea shops flourished, tea shops, teahouses and tea houses were vigorously built, and tea drinking gradually spread to the people, and hot water began to appear frequently in people's daily lives. In the Qing Dynasty, the water was so dirty that people began to do some simple treatment, that is, simple filtration and boiling.
In the Republic of China, the western theory of bacteria was introduced, and "drinking hot water" gained scientific support. Intellectuals called for people to drink hot water more loudly. Realizing its responsibility to public health, the government began to promote hot water to the public intermittently. However, whether it can work depends on economic strength.
Hot water is still healthier than ice water. "Boiling naturally cooled boiled water can not only quench thirst, but also promote cell metabolism, regulate body temperature, increase hemoglobin content in blood, improve immune function and improve disease resistance. Warm boiled water can improve the activity of lactate dehydrogenase in viscera, and help to reduce the accumulation of fatigue hormone and lactic acid in muscles, thus eliminating fatigue. Moreover, boiled water kills a lot of bacteria, which is more conducive to our intestinal health. Ice water is also easy to damage our gastric mucosa, which is not good for the stomach. So in a word, hot water is good, but drink less hot water, because hot water will also harm our gastric mucosa.