I used to be very strange about this question, and it is very valuable to ask it! I think. Later, I found the answer in the article. We have "sodium" in our bodies. Without this thing, it will be thirsty. Therefore, although we have been drinking water, water has washed away a lot of sodium from our bodies, so the more we drink, the more thirsty we become. If we don't want to be thirsty, we can solve it by adding a small amount of salt to the water. Just like diarrhea patients are afraid of dehydration, just add less salt to the water. But because the water is salted, it doesn't taste very good. So you can improve it by adding less sugar to the water. This is the way of summer. As for thirst in winter, we should start with the dry indoor environment. Drinking water alone is not enough. Because sweating in summer can easily take away sodium from our bodies, and solving the dry indoor environment in winter is the primary problem. Many people cannot drink water. In summer, many people drink a lot of ice water, which makes them feel thirsty and refreshing. As we all know, doing so will do some harm to their health. On the one hand, the intake of cold drinks will make the gastrointestinal mucosa suddenly catch cold, make the originally unblocked capillaries contract, and make the smooth muscles spasm, which may cause gastrointestinal discomfort or colic or even diarrhea. On the contrary, some people like drinking boiled water. Overheated diet will damage esophageal mucosa and stimulate mucosal hyperplasia, which has been the conclusion of medical circles. Therefore, the temperature of drinking water should not be too hot or too cold. The optimum temperature is 10-30℃. In addition, drinking water is also scientific. When water needs to be sipped, many people are used to "gurgling" and drinking. As we all know, this way of drinking is not good for your health. Friendly reminder of "nature and water": small amount, multiple times and slow drinking are three basic principles. There are three possible consequences of swigging water: first, drinking a lot of water at once will dilute the blood quickly and increase the burden on the heart. After the exercise, this situation became more serious. Secondly, when sweating heavily in hot days, overeating will increase the amount of perspiration reflexively, further increasing the loss of electrolytes such as sodium and potassium, so people tend to drink more and more thirsty. Third, drinking too fast and too hard will swallow a lot of air together, which is easy to cause hiccups or bloating. A reasonable way to drink water should be to put a mouthful of water in your mouth and swallow it several times, which can fully moisten your mouth and throat and effectively relieve the feeling of thirst. According to statistics, angina pectoris and myocardial infarction often occur in sleep or in the morning. Due to physiological aging and other factors, most elderly people suffer from cardiovascular diseases such as atherosclerosis to varying degrees, and their blood viscosity is also high. People will consume some water because of breathing and sweating at night. In addition, the elderly often have the habit of getting up at night (urinating more) and drinking more water. This will increase blood viscosity, reduce blood flow and make platelets aggregate. Atherosclerotic blood vessels are more prone to embolism. When the embolus falls off in the cerebral artery, coronary artery and its branches, the myocardium can be necrotic due to acute blood supply insufficiency. Therefore, the elderly, especially those with coronary heart disease, pay attention to drinking water is one of the important health care methods to prevent myocardial infarction. Always drink water even if your mouth is not thirsty. According to your own situation, drink water half an hour before going to bed. I wish you good health