There is a popular saying on the Internet that "drink more hot water", to the effect that straight men don't understand girls' minds. Whenever girls feel unwell, they just say to drink more hot water. In real life, whether it is physiological period, gastrointestinal discomfort, headache and brain fever, more people firmly believe in drinking more hot water. It seems that drinking hot water has become a cure for all diseases, but is this really the case? Not exactly.
First of all, drinking more water is good for your health, but it is best to keep warm. Water is the source of life, and we really need to replenish a lot of water to maintain the balance of body fluids, regulate body temperature, and expel nitrogen-containing wastes and other metabolites from the body. Therefore, the idea of drinking more water is correct. According to the recommendation of Dietary Guidelines for China Residents (20 16), adults with mild physical activity should drink at least 1500~ 1700 ml (7-8 cups) of water every day. Under the condition of high temperature or strong physical activity, it should be increased appropriately. It should be noted that drinking too much water will also do harm to human health.
As for the water temperature, China people prefer to be warm, not the hotter the better. Because the delicacy of food is mostly related to temperature, China people have a soft spot for hot food. This can be traced back to 20 thousand years ago. Pottery made by the ancients was used for cooking and boiling water. At the same time, boiling water can also effectively inhibit bacteria. In that era of poor sanitation, the habit of drinking hot water gradually formed. However, modern research believes that drinking water is not as hot as possible. Excessive water temperature will burn the digestive tract mucosa. It is more appropriate to use warm water of 34~38℃, and the water temperature should not exceed 60℃ as far as possible. In addition, many young people are not unable to learn the western habit of drinking cold water and ice water, but our stomach acceptance is not high, which is easy to cause stomach discomfort and induce diseases.
Secondly, can drinking hot water really prevent all diseases? I'm afraid it's just a good wish.
When people are in a state of diseases such as diarrhea, body fluids will decrease and they will feel thirsty easily. Therefore, drinking a cup of warm water can replenish body fluids, which has a certain "warming" effect and relieves muscle and vascular spasm, but it can't relieve the root cause. Taking dysmenorrhea as an example, the fundamental reason lies in the increase of prostaglandin content in endometrial or pelvic organic lesions, and the decrease of estrogen content and pain tolerance in the body. Drinking water can supplement the fluid loss caused by menstruation, but it can't change the hormone level, nor can it alleviate organic diseases. Especially for people with severe dysmenorrhea, drinking hot water can only increase psychological comfort. Even if you drink more hot water, no matter how high the water temperature is, it has little practical significance for relieving dysmenorrhea.
It is not reliable to say that drinking hot water can nourish the stomach. Under the influence of China people's eating habits, too cold food, water or cold air enter the stomach, which will cause vasoconstriction under the gastric mucosa, and then lead to spasmodic pain in the stomach. Drinking warm water at this time can really relieve the pain, which also makes many people mistakenly think that drinking hot water can nourish the stomach. In fact, in addition to drinking warm water, you can also drink soup and coffee, or hot compress can also achieve the effect of relieving stomach discomfort. However, if you drink too much water before and after eating, it may cause the digestive juice in your stomach to be diluted and affect your digestive function.
From personal experience, there are indeed people who drink ice water for a long time, but there are also people who have negative reactions immediately after drinking ice water, or people who drink ice water for a while but have symptoms after passing a certain node.
In the face of two situations, it is a bit arbitrary to directly assert that hot water is just like ice water as long as the water quality is clean.
Also, it needs to be emphasized and reminded that it is true that hot water above 65℃ is harmful to health, but at such a high temperature, most people really can't eat anything. Under related topics, every similar reminder eventually confuses the essential difference between warm water and boiled water close to human body temperature. This video even equates boiling water at100 C with hot water directly, which is a bit excessive.
Regarding drinking ice water, in fact, during the high temperature this summer, CCTV also sent relevant information: from a very hot environment to a very cold environment, it will lead to coronary artery vasospasm, and prolonged spasm will lead to cardiogenic myocardial infarction. Therefore, iced drinks are not the first choice after hot work or strenuous exercise. Even if you really want to drink, you should take a sip and drink slowly.
This summer, there were indeed media reports that young and middle-aged boys died of sudden acute myocardial infarction after drinking ice water after strenuous exercise.