Drinking hot water is one of the most deeply rooted daily habits in Chinese culture, shaped by a combination of traditional medicine, public health history, and infrastructure that reinforces the practice to this day. While it might seem unusual to people from Western countries who default to ice water, the preference for hot (or at least warm) water in China has practical, medical, and cultural logic behind it.
Traditional Chinese Medicine and Digestive Health
The oldest roots of the habit come from Traditional Chinese Medicine (TCM), which has influenced daily life in China for thousands of years. In TCM, the stomach and spleen are considered central to health, and they function best when kept warm. Drinking warm water is thought to support the flow of Qi (the body’s vital energy) and protect what practitioners call “digestive fire,” essentially the body’s ability to break down and absorb food efficiently.
Cold water, by contrast, is believed to slow digestion and cause bloating. TCM categorizes illnesses into “cold” and “hot” syndromes, and introducing cold substances into the body can worsen cold-type symptoms like lost appetite, diarrhea, nausea, cold limbs, and vomiting. Even people in China who don’t actively practice TCM have absorbed these ideas through generations of family advice. The phrase “多喝热水” (drink more hot water) is so common it’s become a cultural reflex, offered as advice for everything from a cold to a bad mood.
The Public Health Campaign That Changed a Nation
While TCM provided the philosophical foundation, a massive government initiative in the 1950s turned hot water drinking from a tradition into a near-universal habit. In 1952, China’s Central Ministry of Health launched the Patriotic Health Campaign, a sweeping public health effort aimed at preventing disease in a country where clean drinking water was not widely available. The campaign used poster series and educational materials to teach citizens that polluted water contains bacteria that cause illness, and that boiling water was one of the simplest ways to prevent disease transmission.
At the time, water treatment infrastructure was minimal across much of China, especially in rural areas. Boiling water was the most accessible form of purification available to hundreds of millions of people. The campaign promoted clean water management alongside other hygiene measures like eradicating lice and mosquitoes, getting vaccinations, and keeping food clean. It worked. Boiling water before drinking became standard practice across the country, and drinking that water while still hot (or warm) became the default rather than letting it cool.
Infrastructure Built Around Hot Water
One reason the habit persists so strongly is that China’s physical infrastructure actively supports it. Hot water dispensers are everywhere. Train stations, including high-speed rail stations, typically provide hot water taps rather than cold water fountains. The trains themselves have hot water available in every car. Schools, universities, hospitals, and office buildings commonly feature hot water machines as the primary source of drinking water. Even when China has exported its rail technology to other countries, the hot water dispensers have come along with it.
This creates a self-reinforcing cycle. People carry thermoses and insulated bottles because hot water is available everywhere, and hot water is available everywhere because people expect it. Visitors to China often notice that restaurants serve hot water or hot tea by default, not ice water. The infrastructure doesn’t just accommodate the habit; it makes cold water the inconvenient option.
What Science Says About Water Temperature
Modern research offers some support for the idea that water temperature affects digestion, though not as dramatically as TCM suggests. A study on healthy volunteers published in the journal Gut found that cold water (around 4°C) emptied from the stomach significantly more slowly than body-temperature water. Warm water (50°C) also emptied somewhat slower than body-temperature water, though the difference wasn’t statistically significant. After drinking either cold or warm water, the stomach returned to normal body temperature within 20 to 30 minutes.
The practical takeaway: cold water does temporarily slow gastric emptying, which could contribute to feelings of heaviness or bloating in some people. Warm water, meanwhile, encourages blood vessels to expand, improving circulation. Cold water has the opposite effect, causing veins to constrict. For most healthy people, the differences are modest, but they do align with the general direction of what TCM has claimed for centuries.
Hot Water and Women’s Health
One of the most specific applications of hot water in Chinese culture involves menstrual health. Women in China are commonly advised to drink hot water during their periods and to avoid cold food and drinks entirely. This advice is so widespread that it’s often one of the first things a Chinese partner or friend will say to someone experiencing cramps.
There is real physiology behind this. A systematic review published in Scientific Reports found that heat application reduces muscle tension and relaxes abdominal muscles, which directly addresses the muscle spasms that cause menstrual pain. Heat also increases pelvic blood circulation, helping to clear local fluid retention and reduce congestion and swelling. This decreases pain caused by nerve compression in the area. While the studies focused on external heat application (like heating pads), drinking warm water contributes to raising core temperature and has long been considered part of the same approach in Chinese households.
Cultural Identity and Daily Ritual
Beyond health reasoning, drinking hot water has become a marker of Chinese cultural identity. It’s woven into social interactions in ways that go beyond practicality. Offering a guest hot water or tea is a basic act of hospitality. Telling someone to “drink more hot water” is an expression of care, even if it has become something of a joke among younger Chinese people who find it an overly simple response to any complaint.
The habit also connects to a broader Chinese cultural preference for consuming things at warm temperatures. Soups are a staple at meals. Cold salads are far less common than in Western cuisines. Even beer is sometimes served at room temperature. The underlying logic, whether articulated through TCM or simply passed down as common sense, is that the body shouldn’t have to work to warm up what you put into it. Hot water fits naturally into a food culture that already prioritizes warmth as a form of nourishment and balance.