The International Agency for Research on Cancer has listed hot drinks above 65 ° C as carcinogens. Numerous studies have confirmed that long-term consumption of overheated foods increases the risk of developing esophageal cancer. In addition, eating overheated food may also bring a series of other hazards. In fact, from the moment hot food enters the mouth, harm follows one after another. First stop: Oral scalding may directly burn the oral mucosa, causing redness, congestion, oral ulcers, gum ulceration, tooth sensitivity and other problems. Long term consumption of hot food can also damage the taste buds on the surface of the tongue, affect the transmission of taste nerves, lead to numbness in the mouth, reduce appetite, and make the taste increasingly strong. Repeated stimulation can damage the oral mucosa and increase the risk of developing oral cancer. Second stop: The esophageal mucosa is easily damaged after being stimulated by hot food, which may lead to symptoms such as esophageal edema and ulcers. Over time, this can also cause esophagitis, esophageal bleeding, esophageal stenosis, and even trigger serious diseases such as esophageal cancer. Third stop: The gastric mucosa is very sensitive to high-temperature food, and scalding may cause damage, inflammation, and ulcers to the gastric mucosa. Long term chronic stimulation may lead to chronic gastritis, erosion, and even induce epithelial cell carcinogenesis. Fourth stop: If the temperature of food in the intestine is too high, it can disrupt the balance of the gut microbiota, leading to intestinal dysfunction and potentially causing intestinal problems such as diarrhea and constipation. The oral heat-resistant temperature ranges from 65 ℃ to 70 ℃, the esophageal mucosa heat-resistant temperature ranges from 45 ℃ to 50 ℃, and the gastric mucosa heat-resistant temperature ranges from 40 ℃. So, sometimes I feel that the food is not hot in the mouth, but it may burn the esophagus and stomach, causing gastritis, gastric erosion, and so on. As age increases, the body's perception of thermal pain will also slightly decrease. In addition, prolonged exposure to hot food can cause keratinization changes similar to "skin calluses" in newly formed mucosal cells, making them less sensitive to temperature perception. Cool the food before eating, which is a protection for the digestive tract and intestines, but it should not be too cold. In addition, when eating, chew slowly, do not speak, and do not consume excessively stimulating food. (New Society)